Gurpreet Singh Selopal
@inrs.ca
Centre Énergie Materiaux Télecommunications
Institut National de la Recherche Scientifique, Centre Énergie Materiaux Télecommunications
RESEARCH INTERESTS
Design and synthesis of advanced engineered nanomaterials for photovoltaic, hydrogen generation, CO2 reduction, water purification, photo-/electro-catalysis and biomedical applications.
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Rabia Javed, Uzma Sharafat, Ayesha Rathnayake, Lakshman Galagedara, Gurpreet Singh Selopal, Raymond Thomas, and Mumtaz Cheema
Elsevier BV
Fabiola Navarro-Pardo, Gurpreet Singh Selopal, Alma P. Hernandez-Gonzalez, Ebrahim Ghasemy, Jiabin Liu, Kulbir K. Ghuman, Ana C. Tavares, Zhiming M. Wang, and Federico Rosei
Elsevier BV
Swedha Madhu, Jayden MacKenzie, Kuljeet Singh Grewal, Aitazaz A. Farooque, Ghada I. Koleilat, and Gurpreet Singh Selopal
Wiley
AbstractThe rapid expansion of industrialization has resulted in the release of multiple ecological contaminants in gaseous, liquid, and solid forms, which pose significant environmental risks to many different ecosystems. The efficient and cost‐effective removal of these environmental pollutants has attracted global attention. This growing concern has prompted the synthesis and optimization of nanomaterials and their application as potential pollutant removal. In this context, MXene is considered an outstanding photocatalytic candidate due to its unique physicochemical and mechanical properties, which include high specific surface area, physiological compatibility, and robust electrodynamics. This review highlights recent advances in shaping titanium carbide (Ti3C2Tx) MXenes, emphasizing the importance of termination groups to boost photoactivity and product selectivity, with a primary focus on engineering aspects. First, a broad overview of Ti3C2Tx MXene is provided, delving into its catalytic properties and the formation of surface termination groups to establish a comprehensive understanding of its fundamental catalytic structure. Subsequently, the effects of engineering the morphology of Ti3C2Tx MXene into different structures, such as two‐dimensional (2D) accordion‐like forms, monolayers, hierarchies, quantum dots, and nanotubes. Finally, a concise overview of the removal of different environmental pollutants is presented, and the forthcoming challenges, along with their prospective outlooks, are delineated.
S. Kokilavani, Gurpreet Singh Selopal, Lei Jin, Pawan Kumar, David Barba, and Federico Rosei
Wiley
AbstractDoping in semiconductor quantum dots (QDs) using optically active dopants tailors their optical, electronic, and magnetic properties beyond what is achieved by controlling size, shape, and composition. Herein, we synergistically modulated the optical properties of eco‐friendly ZnInSe2/ZnSe core/shell QDs by incorporating Cu‐doping and Mn‐alloying into their core and shell to investigate their use in anti‐counterfeiting and information encryption. The engineered “Cu:ZnInSe2/Mn:ZnSe” core/shell QDs exhibit an intense bright orange photoluminescence (PL) emission centered at 606 nm, with better color purity than the undoped and individually doped core/shell QDs. The average PL lifetime is significantly extended to 201 ns, making it relevant for complex encryption and anti‐counterfeiting. PL studies reveal that in Cu:ZnInSe2/Mn:ZnSe, the photophysical emission arises from the Cu state via radiative transition from the Mn 4T1 state. Integration of Cu:ZnInSe2/Mn:ZnSe core/shell QDs into poly(methyl methacrylate) (PMMA) serves as versatile smart concealed luminescent inks for both writing and printing patterns. The features of these printed patterns using Cu:ZnInSe2/Mn:ZnSe core/shell QDs persisted after 10 weeks of water‐soaking and retained 70 % of PL emission intensity at 170 °C, demonstrating excellent thermal stability. This work provides an efficient approach to enhance both the emission and the stability of eco‐friendly QDs via dopant engineering for fluorescence anti‐counterfeiting applications.
Lei Jin, Gurpreet Singh Selopal, Xin Liu, Daniele Benetti, and Federico Rosei
Wiley
AbstractLuminescent solar concentrators (LSCs) are complementary sunlight collectors for photovoltaics (PVs). Emissive fluorophores embedded in a transparent waveguide collect solar radiation over a large area and convert it into luminescence directed to the PV cells that frame the waveguide's edges. Among various fluorophores, perovskite nanocrystals (PNCs) show considerable potential for LSCs thanks to their wide size/composition/shape tunable broad absorption spectrum ranging from UV to near‐infrared, which significantly overlaps with the solar spectrum. They also feature high brightness with a photoluminescence quantum yield of up to 100% and ease of fabrication through wet chemistry approaches. In addition, PNCs can be engineered to minimize the absorption/emission overlap, which is the key to suppressing energy losses caused by reabsorption. Here, the structure and properties of PNCs and then correlate them with LSC performance is presented. The synthesis of PNCs using wet‐chemistry approaches and summarize the latest developments of PNCs‐based LSCs, categorized by the engineering strategies of PNCs and the design of the LSC configurations is critically reviewed. Finally, it is described major challenges and perspectives for future work, outlining the rational design, synthesis, PNC loading, surface engineering, and machine‐learning‐based tuning of PNC‐LSC.
Lei Jin, Gurpreet Singh Selopal, Xin Tong, Dmytro F. Perepichka, Zhiming M. Wang, and Federico Rosei
Wiley
AbstractColloidal quantum dots (QDs) hold great promise as building blocks in solar technologies owing to their remarkable photostability and adjustable properties through the rationale involving size, atomic composition of core and shell, shapes, and surface states. However, most high‐performing QDs in solar conversion contain hazardous metal elements, including Cd and Pb, posing significant environmental risks. Here, a comprehensive review of heavy‐metal‐free colloidal QDs for solar technologies, including photovoltaic (PV) devices, solar‐to‐chemical fuel conversion, and luminescent solar concentrators (LSCs), is presented. Emerging synthetic strategies to optimize the optical properties by tuning the energy band structure and manipulating charge dynamics within the QDs and at the QDs/charge acceptors interfaces, are analyzed. A comparative analysis of different synthetic methods is provided, structure‐property relationships in these materials are discussed, and they are correlated with the performance of solar devices. This work is concluded with an outlook on challenges and opportunities for future work, including machine learning‐based design, sustainable synthesis, and new surface/interface engineering.
Hui Zhang, Jiabin Liu, Lucas V. Besteiro, Gurpreet S. Selopal, Zhenhuan Zhao, Shuhui Sun, and Federico Rosei
Wiley
AbstractSemiconductor core/shell quantum dots (QDs) are considered promising building blocks to fabricate photoelectrochemical (PEC) cells for the direct conversion of solar energy into hydrogen (H2). However, the lattice mismatch between core and shell in such QDs results in undesirable defects and severe carrier recombination, limiting photo‐induced carrier separation/transfer and solar‐to‐fuel conversion efficiency. Here, an interface engineering approach is explored to minimize the core‐shell lattice mismatch in CdS/CdSexS1‐x (x = 0.09–1) core/shell QDs (g‐CSG). As a proof‐of‐concept, PEC cells based on g‐CSG QDs yield a remarkable photocurrent density of 13.1 mA cm−2 under AM 1.5 G one‐sun illumination (100 mW cm−2), which is ≈54.1% and ≈33.7% higher compared to that in CdS/CdSe0.5S0.5 (g‐CSA) and CdS/CdSe QDs (g‐CS), respectively. Theoretical calculations and carrier dynamics confirm more efficient carrier separation and charge transfer rate in g‐CSG QDs with respect to g‐CSA and g‐CS QDs. These results are attributed to the minimization of the core‐shell lattice mismatch by the cascade gradient shell in g‐CSG QDs, which modifies carrier confinement potential and reduces interfacial defects. This work provides fundamental insights into the interface engineering of core/shell QDs and may open up new avenues to boost the performance of PEC cells for H2 evolution and other QDs‐based optoelectronic devices.
Lei Jin, Jiabin Liu, Xin Liu, Daniele Benetti, Gurpreet Singh Selopal, Xin Tong, Ehsan Hamzehpoor, Faying Li, Dmytro F. Perepichka, Zhiming M. Wang,et al.
Wiley
Thick-shell colloidal quantum dots (QDs) are promising building blocks for solar technologies due to their size/composition/shape-tunable properties. However, most well-performed thick-shell QDs suffer from frequent use of toxic metal elements including Pb and Cd, and inadequate light absorption in the visible and near-infrared (NIR) region due to the wide bandgap of the shell. In this work, eco-friendly AgInSe2 /AgInS2 core/shell QDs, which are optically active in the NIR region and are suitable candidates to fabricate devices for solar energy conversion, are developed. Direct synthesis suffers from simultaneously controlling the reactivity of multiple precursors, instead, a template-assisted cation exchange method is used. By modulating the monolayer growth of template QDs, gradient AgInSeS shell layers are incorporated into AgInSe2 /AgInS2 QDs. The resulting AgInSe2 /AgInSeS/AgInS2 exhibits better charge transfer than AgInSe2 /AgInS2 due to their favorable electronic band alignment, as predicted by first-principle calculations and confirmed by transient fluorescence spectroscopy. The photoelectrochemical cells fabricated with AgInSe2 /AgInSeS/AgInS2 QDs present ≈1.5-fold higher current density and better stability compared to AgInSe2 /AgInS2 . The findings define a promising approach toward multinary QDs and pave the way for engineering the QDs' electronic band structures for solar-energy conversion.
Weihua Li, Yuanyuan Han, Lihua Wang, Gurpreet Singh Selopal, Xiaohan Wang, and Haiguang Zhao
Royal Society of Chemistry (RSC)
Highly bright solid-state C-dots for an efficient temperature-sensitive anticounterfeiting system.
Pawan Kumar, Lei Jin, Gurpreet Singh Selopal, Omar Abdelkarim, Jiabin Liu, David Barba, Aycan Yurtsever, Zhiming M. Wang, and Federico Rosei
Elsevier BV
Lei Jin, Gurpreet Singh Selopal, Xiao Wei Sun, and Federico Rosei
Wiley
AbstractColloidal quantum dots (QDs) are promising building blocks in optoelectronic devices, mainly due to their size/shape/composition‐tunable properties. Core–shell QDs, in particular, offer enhanced stability, mitigated photoluminescence blinking, and suppressed non‐radiative recombination compared to plain QDs, making them highly promising for energy conversion applications such as photovoltaic devices, luminescent solar concentrators, solar‐driven hydrogen production, and light‐emitting diodes. Here, a comprehensive analysis of core–shell QDs in energy conversion technologies is provided. Emerging design strategies are explored and various synthetic methods focusing on optimizing band structure, band alignment, and optical properties are critically explored. Insights into the structure‐property relationship are discussed, highlighting recent advancements and the most effective strategies to enhance energy conversion performance. The review is concluded by addressing key challenges and proposing future research directions, emphasizing the need for rational design, precise synthesis, effective surface engineering, and the integration of machine learning to achieve optimized properties for technological applications.
Noushad Ahamed Chittoor Mohammed, Kuljeet Singh Grewal, Misbaudeen Aderemi Adesanya, Sudipta Debnath, Aitazaz A. Farooque, and Gurpreet Singh Selopal
Wiley
AbstractTo attain net zero energy‐ready building (NZErB) status, various research efforts have focused on identifying potential strategies and creating stringent code compliances for builders. This review presents a comparative assessment of Canadian newly constructed, retrofitted, and potential retrofit buildings from the mid‐1900s to 1990, all aiming for NZErB status. 22 case studies from climate zones 5, 6, and 7a are evaluated, including 12 new constructions and 4 retrofitted, and 6 potential retrofit buildings. A life cycle assessment (LCA) analysis is conducted to understand the environmental impacts of different insulation materials. Additionally, this review highlights retrofitted buildings measures toward climate resilience, challenges inretrofitting, andstrategies for achieving high‐quality retrofits. The work concluded that 83.3% of new buildings achieved level 5 in thermal energy demand intensity (TEDI), while 70% of completed and potential retrofits reached level 5 in mechanical energy usage intensity (MEUI). Cellulose insulation showed the lowest global warming potential (GWP) at 12.07 kg CO₂‐e·m−3. By comparing the performance of new constructions with completed and potential retrofits, this review provides valuable insights into the feasibility and effectiveness of retrofitting older buildings to attain net zero energy readiness.
Lei Jin, Ehsan Hamzehpoor, Gurpreet Singh Selopal, Jiabin Liu, Pawan Kumar, Daniele Benetti, Xin Tong, Dmytro F. Perepichka, Zhiming M. Wang, and Federico Rosei
Wiley
AbstractQuantum dots (QDs) are promising building blocks for luminescent solar concentrators (LSCs), yet most QD‐based LSCs suffer from toxic metal composition and color tinting. UV‐selective harvesting QDs can enable visible transparency, but their development is restricted by large reabsorption losses and low photoluminescence quantum yield (PLQY). The developed here Ag, Mn: ZnInS2/ZnS QDs show a high PLQY of 53% due to the passivating effect of ZnS shell. These QDs selectively absorb UV light and emit orange‐red light with a large Stokes shift of 180 nm. A LSC of 5 × 5 × 0.2 cm3, fabricated using a poly(lauryl methacrylate) (PLMA) as a matrix, maintains 87% of integrated PL after 7 h of UV exposure. The QD‐PLMA achieved 90.7% average visible transparency (AVT) and a color rendering index (CRI) of 95.8, which is close to plain PLMA (AVT = 90.8%; CRI = 99.5), yielding excellent visible light transparency. Incorporating Si‐PVs at LSC edges, the Ag, Mn: ZIS/ZnS QD‐LSC achieved an optical efficiency of 1.42%, ranking competitively among high‐performing UV‐harvesting LSCs.
Pawan Kumar, Rajkumar Patel, Navadeep Shrivastava, Madhumita Patel, Simon Rondeau-Gagné, and Gurpreet Singh Selopal
Elsevier BV
Huaqian Zhi, Xin Tong, Yimin You, Ali Imran Channa, Xin Li, Jiang Wu, Gurpreet Singh Selopal, and Zhiming M. Wang
Wiley
Herein, highly luminescent eco‐friendly CuGaS2/ZnS (CGS/ZnS) and CuGaInS2/ZnS (CGIS/ZnS) core/shell quantum dots (QDs) are rationally prepared for luminescent solar concentrator (LSC) application. It is demonstrated that the optical properties of these core/shell QDs can be tailored by engineering the ZnS shell thickness, leading to large Stokes shifts and high‐photoluminescence quantum yields up to 94.6%. As‐synthesized core/shell QDs with optimized optical properties are employed to fabricate LSCs (5 × 5 × 0.5 cm3) using glasses as waveguides, wherein the individual CGS/ZnS and CGIS/ZnS QD‐based LSCs, respectively, exhibit an optical efficiency (η opt) of ≈3.26% and 6.53% under AM1.5G illumination (100 mW cm−2). Remarkably, a tandem QDs‐LSC integrated via vertical stacking of the top yellow‐emitting CGS/ZnS QDs‐LSC and bottom red‐emitting CGIS/ZnS QDs‐LSC delivers an optical efficiency (η opt) as high as 9.94%, which is, respectively, ≈3 and 1.5 times higher than the individual QDs‐LSCs and is comparable to various best‐reported QDs‐LSCs. The results indicate that environment‐benign I–III–VI2 core/shell QDs with engineered optical properties and LSC architectural design are promising to develop future cost‐effective and high‐performing building‐integrated photovoltaics.
Lei Jin, Ehsan Hamzehpoor, Jiabin Liu, Xin Liu, Daniele Benetti, Gurpreet Singh Selopal, Dmytro F. Perepichka, Zhiming M. Wang, and Federico Rosei
Royal Society of Chemistry (RSC)
CuGaS2/ZnS quantum dots with a Stokes shift of ∼190 nm and PLQY of 80% were developed for LSCs, which achieved an optical efficiency of 1.7%. A tandem configuration integrating near-infrared-active AgInS2/ZnS achieved an optical efficiency of 4.4%.
Gurpreet Singh Selopal, Omar Abdelkarim, Jasneet Kaur, Jiabin Liu, Lei Jin, Zhangsen Chen, Fabiola Navarro-Pardo, Sergei Manzhos, Shuhui Sun, Aycan Yurtsever,et al.
Royal Society of Chemistry (RSC)
The photoelectrochemical devices based on TiO2–CNTs/F-h-BN/QDs yield a 46% improvement compared to the control device (TiO2/QDs) due to reduced trap and associated non-radiative carrier recombination.
Jiabin Liu, Shuai Yue, Hui Zhang, Chao Wang, David Barba, François Vidal, Shuhui Sun, Zhiming M. Wang, Jiming Bao, Haiguang Zhao,et al.
American Chemical Society (ACS)
InP quantum dots (QDs) are promising building blocks for use in solar technologies because of their low intrinsic toxicity, narrow bandgap, large absorption coefficient, and low-cost solution synthesis. However, the high surface trap density of InP QDs reduces their energy conversion efficiency and degrades their long-term stability. Encapsulating InP QDs into a wider bandgap shell is desirable to eliminate surface traps and improve optoelectronic properties. Here, we report the synthesis of "giant" InP/ZnSe core/shell QDs with tunable ZnSe shell thickness to investigate the effect of the shell thickness on the optoelectronic properties and the photoelectrochemical (PEC) performance for hydrogen generation. The optical results demonstrate that ZnSe shell growth (0.9-2.8 nm) facilitates the delocalization of electrons and holes into the shell region. The ZnSe shell simultaneously acts as a passivation layer to protect the surface of InP QDs and as a spatial tunneling barrier to extract photoexcited electrons and holes. Thus, engineering the ZnSe shell thickness is crucial for the photoexcited electrons and hole transfer dynamics to tune the optoelectronic properties of "giant" InP/ZnSe core/shell QDs. We obtained an outstanding photocurrent density of 6.2 mA cm-1 for an optimal ZnSe shell thickness of 1.6 nm, which is 288% higher than the values achieved from bare InP QD-based PEC cells. Understanding the effect of shell thickness on surface passivation and carrier dynamics offers fundamental insights into the suitable design and realization of eco-friendly InP-based "giant" core/shell QDs toward improving device performance.
Love Karan Rana, Prabhjyot Kaur, Alborz Bavandsavadkouhi, Gurpreet Singh Selopal, and Adam Duong
Royal Society of Chemistry (RSC)
Interesting correlation between various analytical techniques has been made in this work concerning new isostructural CPs.
Lin Liang, Lei Jin, Gurpreet Singh Selopal, and Federico Rosei
MDPI AG
As the world’s largest energy importer, consumer and with the second-largest economy, China is heavily dependent on fossil fuels. Massive energy imports make China a major stakeholder in the world energy trade, with significant implications and repercussions on the global economy. The desire to be energy independent and the environmental impact of fossil fuels is prompting China to diversify its energy supply, adapt its domestic energy infrastructure, and deploy renewable energy technologies on an unprecedented scale. Intending to position itself internationally, China has developed an energy diplomacy strategy while formulating international relations policies. In particular, the government emphasizes sustainable development through the large-scale deployment of renewable energy technologies, which will help build Western China while simultaneously reducing pollution across the country, elevating China to a position of global leadership in the energy sector. Intellectual property and technological capabilities developed in China can be exported worldwide, including in the regions where the population has limited or no access to energy. In addition, this strategy will have worldwide implications as it will directly or indirectly help achieve several Sustainable Development Goals (SDGs), including clean energy, education, eradicating poverty, climate action and sustainable cities and communities. On this basis, we anticipate that China’s energy policies may have long-lasting prospects for global peace, thus constituting an interesting and relevant case study for the emerging concept of “peace engineering.”
Hugo G. Lemos, Rodrigo M. Ronchi, Guilherme R. Portugal, Jessica H. H. Rossato, Gurpreet S. Selopal, David Barba, Everaldo C. Venancio, Federico Rosei, Jeverson T. Arantes, and Sydney F. Santos
American Chemical Society (ACS)
Omar Abdelkarim, Amir Mirzaei, Gurpreet S. Selopal, Aycan Yurtsever, Ghada Bassioni, Zhiming M. Wang, Mohamed Chaker, and Federico Rosei
Elsevier BV
Rusoma Akilimali, Gurpreet Singh Selopal, Mahyar Mohammadnezhad, Ibrahima Ka, Zhiming M. Wang, Gregory P. Lopinski, Haiguang Zhao, and Federico Rosei
Elsevier BV
Gurpreet Singh Selopal, Omar Abdelkarim, Pawan Kumar, Lei Jin, Jiabin Liu, Haiguang Zhao, Aycan Yurtsever, Francois Vidal, Zhiming M. Wang, and Federico Rosei
American Chemical Society (ACS)
Omar Abdelkarim, Gurpreet S. Selopal, Karthik Suresh, Fabiola Navarro-Pardo, Pawan Kumar, Kulbir K. Ghuman, Aycan Yurtsever, Ghada Bassioni, Zhiming M. Wang, and Federico Rosei
Elsevier BV