A synergistic molecular lock strategy enables efficient and durable wide bandgap perovskite/TOPCon tandem solar cells Zehang Liu, Ruoyu Li, Yuzhou Wu, Tao Zhang, Yaxuan Yang, Xinquan Wang, Jing Li, Qingquan He, Jun Pan Chemical Communications, 2026 A molecular lock strategy using the EnPO additive was developed for perovskite/TOPCon tandem devices. The synergistic dual-site passivation and optimized energy-level alignment simultaneously bolster both the performance and stability of the devices.
Amphoteric molecular engineering of the buried SnO2/perovskite interface toward efficient and durable solar cells Qingquan He, Yu Bao, Shicheng Pan, Tao Zhang, Xinquan Wang, Yaxuan Yang, Qingyue Guo, Jijin Qiao, Jing Li, Jun Pan Journal of Materials Chemistry A, 2026 The amphoteric small molecule dichloro(diethylamino)phosphine (DDP) effectively enhances the crystallinity of perovskite films and passivates defects at the buried interfaces, achieving an efficiency of 25.54% with impressive thermal stability.
Simultaneous Solvent and Interface Engineering of Electron Transport Layer for Efficient and Stable Perovskite Solar Cells Qingquan He, Ruoyu Li, Tao Zhang, Zehang Liu, Yuzhou Wu, Xianming Cai, Xinquan Wang, Yaxuan Yang, Jing Li, Jun Pan Nano Letters, 2026 Despite the high electron mobility and favorable interfacial properties, [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) electron transport layers (ETLs) in perovskite solar cells often suffer from molecular aggregation, resulting in inhomogeneous films, insufficient defect passivation, and suboptimal energy-level alignment. Here, we introduce acetyl cyanide (AC) as a processing additive into the PCBM precursor solution. Through van der Waals interactions, AC disrupts π-π stacking between PCBM molecules, thereby improving dispersion and enhancing film homogeneity. This strategy significantly improves the conductivity and charge extraction capability of the PCBM ETL, while also optimizing energy-level alignment and strengthening interfacial passivation. Consequently, AC-modified devices achieve an efficiency of 25.75%, along with excellent operational stability, retaining over 80% of their initial performance after 1400 h under both ambient conditions and 85 °C thermal stress in nitrogen. This work offers a scalable and effective strategy to mitigate PCBM aggregation, facilitating more efficient and stable perovskite photovoltaics.
Interface-Engineered Composite Self-Assembled Monolayers Driving Efficient and Stable Wide-Bandgap Perovskite and Tandem Solar Cells Qingquan He, Xinquan Wang, Gang Xu, Tao Zhang, Ruoyu Li, Zehang Liu, Yu Bao, Yaxuan Yang, Jijin Qiao, Jing Li, Jun Pan ACS Applied Materials and Interfaces, 2026 Wide-bandgap (WBG) perovskite solar cells (PSCs) based on self-assembled monolayers (SAMs) have demonstrated impressive efficiencies, though their performance and longevity remain substantially compromised by poor wettability during film formation, defects, and energy-level misalignment at the interfaces. Herein, we develop an interface regulation strategy employing a tris(4-carboxyphenyl)phosphine oxide (TC) modified [4-(7H-benzimidazol-7-yl)butyl]phosphonic acid (4PADCB) to construct a multifunctional composite SAM (Co-SAM). The incorporation of TC molecules significantly enhances the interfacial wetting characteristics and crystallization quality of WBG perovskites, effectively passivating defects, optimizing energy-level alignment, and facilitating selective charge transport. This Co-SAM strategy yields impressive device performance: 1.68 eV WBG PSCs achieve a champion power conversion efficiency (PCE) of 22.40% while maintaining >90% of initial efficiency after 1440 h of ambient storage. Furthermore, perovskite/silicon tandem solar cells fabricated using this approach reach a PCE of 30.74%. Our work establishes a new paradigm in interfacial molecular engineering for highly efficient and operationally stable tandem photovoltaics.
Surface Passivation of Cs2AgI3:Cu with AgI for High-Performance X-Ray Imaging Scintillators Muhammad Bilal, Kun Zhou, Tengyue He, Shuyi Lin, Ahmed Uddin, Jun Yin, Qingquan He, Omar F. Mohammed, Jun Pan Advanced Functional Materials, 2026 High‐performance X‐ray scintillators are essential for advanced imaging technologies in various fields, including security, aerospace, high‐energy physics, and health care. However, the existing scintillation materials in the X‐ray community face significant challenges related to low light yield, long decay time, afterglow, and toxicity. This study reports a novel post‐synthesis surface engineering strategy for copper (Cu)‐doped dicesium silver iodide (Cs2AgI3) using a precisely controlled silver iodide (AgI) treatment to address surface defects, significantly enhancing radiative channels. Density functional theory calculations indicate that AgI treatment passivates the surface defects introduced by Cu⁺ doping, substantially reducing nonradiative recombination centers. Thus, the proposed scintillator achieves an exceptional light yield of over 55 000 photons MeV−1 and a rapid response time of ≈426.4 ns, significantly outperforming the existing commercial scintillators. Furthermore, the scintillator film exhibits an impressive X‐ray imaging resolution (18.5 lp mm−1), enhanced durability, and easy processing, facilitating the scalable production of flexible scintillation screens. These significant advancements underscore the potential of the surface engineering strategy for next‐generation scintillation materials in X‑ray imaging technology.
Perovskite Quantum Dots Jun Pan, Jing Li, Qingquan He, Xiaofeng Hu, Jiajie Ye, Chenchen Yang, Xiuyuan Chen Handbook of Perovskites Chemistry Synthesis and Applications, 2026 Perovskite quantum dots have garnered significant attention due to their exceptional optoelectronic properties and wide range of applications. These perovskite quantum dots offer distinct advantages such as a tunable bandgap, high photoluminescence quantum efficiency, excellent color purity, and high carrier mobility, showcasing immense potential in fields like display technology, photovoltaics, X-ray imaging, and biomedicine. This chapter starts by outlining the research background of perovskite quantum dots and offers a comprehensive overview of their structural characteristics, categories, properties, and applications. Specifically, this chapter covers the synthesis methods of perovskite quantum dots, their optoelectronic properties, stability, chemical tuning, and applications in optoelectronic and biomedical fields. Finally, this chapter summarizes the current research status of perovskite quantum dots, discusses existing problems and challenges, and forecasts future development trends and prospects.
Molecular Pinning Effect in Composite Self-Assembled Monolayers Enabling Efficient Perovskite/TOPCon Tandem Solar Cells Qingquan He, Yuzhou Wu, Tao Zhang, Zehang Liu, Ruoyu Li, Gang Xu, Yu Bao, Xinquan Wang, Yaxuan Yang, Jing Li, Zijia Li, Chenxu He, Kai Wang, Jun Pan Angewandte Chemie International Edition, 2026 Perovskite‐based single junction and tandem solar cells (TSCs) based on self‐assembled monolayers (SAMs) still suffer from interfacial losses related to poor wettability during film formation, defect states of perovskites, and suboptimal energy‐level alignment of devices. Herein, we propose a composite SAM (Co‐SAM) strategy based on tetrahedral‐symmetry‐driven molecular pinning effect of 4,4′,4″,4‴‐methanetetrayltetrabenzoic acid (4MA) with Me‐4PACz for efficient and durable wide bandgap perovskite solar cells (WBG PSCs) and perovskite/TOPCon TSCs. This design enhances monolayer uniformity on NiO x , improves wettability of substrates, and regulates crystallization through Pb‐O coordination and hydrogen bonding, thereby passivating buried‐interface defects and optimizing energy‐level alignment. As a result, inverted 1.68 eV WBG PSCs achieve a champion efficiency of 23.52%, along with impressive stability, retaining over 80% after 1000 h of thermal aging at 85°C in an N 2 atmosphere. Furthermore, the Co‐SAM strategy demonstrates excellent generality, boosting the efficiency of 1 cm 2 TSCs to 32.26% (certified 32.10%). This work offers a versatile interfacial engineering approach toward highly efficient, stable, and scalable perovskite photovoltaics.
Low dimensional metal halide perovskites and hybrids Chenkun Zhou, Haoran Lin, Qingquan He, Liangjin Xu, Michael Worku, Maya Chaaban, Sujin Lee, Xiaoqin Shi, Mao-Hua Du, Biwu Ma Materials Science and Engineering R Reports, 2019
Data-driven discovery of high-performance surface passivators for efficient and stable perovskite solar cells F Zhou, Z Wang, S Zhao, X Zhang, Q Guo, R Dai, F Meng, H Lyu, J Wan, ... Chemical Engineering Journal, 175529 , 2026 2026
Simultaneous Solvent and Interface Engineering of Electron Transport Layer for Efficient and Stable Perovskite Solar Cells Q He, R Li, T Zhang, Z Liu, Y Wu, X Cai, X Wang, Y Yang, J Li, J Pan Nano Letters 26 (10), 3398-3406 , 2026 2026
Interface-Engineered Composite Self-Assembled Monolayers Driving Efficient and Stable Wide-Bandgap Perovskite and Tandem Solar Cells Q He, X Wang, G Xu, T Zhang, R Li, Z Liu, Y Bao, Y Yang, J Qiao, J Li, ... ACS Applied Materials & Interfaces 18 (9), 14372-14381 , 2026 2026
Surface Passivation of Cs 2 AgI 3 :Cu with AgI for High‐Performance X‐Ray Imaging Scintillators M Bilal, K Zhou, T He, S Lin, A Uddin, J Yin, Q He, OF Mohammed, J Pan Advanced Functional Materials 36 (14), e17266 , 2026 2026 Citations: 3
Molecular Pinning Effect in Composite Self‐Assembled Monolayers Enabling Efficient Perovskite/TOPCon Tandem Solar Cells Q He, Y Wu, T Zhang, Z Liu, R Li, G Xu, Y Bao, X Wang, Y Yang, J Li, Z Li, ... Angewandte Chemie International Edition, e5162616 , 2026 2026
Synergistic molecular lock strategy enables efficient and durable wide bandgap perovskite/TOPCon tandem solar cells Z Liu, R Li, Y Wu, T Zhang, Y Yang, X Wang, J Li, Q He, J Pan Chemical Communications , 2026 2026
Amphoteric molecular engineering of the buried SnO 2/perovskite interface toward efficient and durable solar cells Q He, Y Bao, S Pan, T Zhang, X Wang, Y Yang, Q Guo, J Qiao, J Li, J Pan Journal of Materials Chemistry A 14 (23), 14292-14299 , 2026 2026
Perovskite Quantum Dots: Synthesis, Properties, Chemistry, and Applications J Pan, J Li, Q He, X Hu, J Ye, C Yang, X Chen Handbook of Perovskites, 335-393 , 2026 2026
Corrigendum to “Enhancing dual functional oxygen-vacant Z-scheme 3D-ZnO/2D-oxygen doped g-C3N4 nanocomposites for efffcient photocatalytic bisphenol A degradation and CO2 … A Uddin, M Bilal, J Qian, M Akram, Q He Separation and Purification Technology 374, 134203 , 2025 2025
Enhancing dual functional oxygen-vacant Z-scheme 3D-ZnO/2D-oxygen doped g-C3N4 nanocomposites for efficient photocatalytic bisphenol A degradation and CO2 reduction A Uddin, M Bilal, J Qian, M Akram, Q He Separation and Purification Technology 371, 133420 , 2025 2025 Citations: 9
Benzylhydrazinium Chloride Interface Engineering Boosts Performance of Wide‐Bandgap Perovskite and Tandem Solar Cells Y Yu, G Xu, T Zhang, Z Liu, Y Wu, X Wang, Q He Solar RRL 9 (19), e202500478 , 2025 2025 Citations: 1
Thermally stable ethylammonium doping strategy for pure red emission in CsPbI3 quantum dot light-emitting diodes J Li, X Chen, Y Feng, X Hu, J Liu, J Ye, C Yang, Q He, H He, Z Ye, X Dai, ... Science Bulletin , 2025 2025 Citations: 3
Synergistic Dual‐Interface Engineering in Perovskite Solar Cells via Chloramine Hydrochloride Molecular Bridges F Zhou, X Zhang, R Dai, Q Guo, Y Dong, F Meng, J Wan, Z Wang, H Lyu, ... Angewandte Chemie International Edition 64 (32), e202507182 , 2025 2025 Citations: 15
X-ray scintillators, metal halide hybrids, devices, and methods B Ma, LJ Xu, Q He US Patent 12,372,670 , 2025 2025
Highly efficient pure red light-emitting diodes enabled by multifunctional ligand-coordinated CsPbI3 quantum dots J Li, X Hu, Y Feng, X Chen, J Ye, X Wang, C Yang, D Zhang, Q Cai, H He, ... Nano Energy 140, 111055 , 2025 2025 Citations: 24
Erbium-Anchoring Surface Engineering Enables Dual-Shell Stabilized CsPbI 3 Quantum Dots for Efficient Pure-Red Light-Emitting Diodes J Li, J Ye, D Zhang, X Hu, S Lin, X Chen, Y Feng, C Yang, Q Cui, Q Cai, ... Nano letters 25 (26), 10656-10665 , 2025 2025 Citations: 4
Tailoring Molecular Conjugation Size for Efficient Defect Passivation in Perovskite Photovoltaics T Zhang, Q He, X Chen, A Chen, J Yu, S Pan, G Xu, Z Zhang, X Bian, ... ACS Materials Letters 7 (4), 1135-1143 , 2025 2025 Citations: 7
Synergistic stabilization of perovskite quantum dots via in situ encapsulation in a thiomethyl-functionalized covalent organic framework Y Xie, H Zhang, P Maity, J Qian, G Xu, H Wang, T Chen, K Zhou, H Hu, ... Cell Reports Physical Science 6 (2) , 2025 2025 Citations: 10
Boosting photovoltaic efficiency: the role of functional group distribution in perovskite film passivation Q He, S Pan, T Zhang, X Chen, A Chen, G Xu, K Zhou, J Li, H Zhu, ... Small 21 (5), 2410481 , 2025 2025 Citations: 18
Tailoring efficient manganese bromide-based scintillator films with ethyl acetate assistance K Zhou, M Bilal, K Xia, Y Xie, T Chen, X Hu, X Chen, C Yang, S Pan, G Xu, ... Nanotechnology 36 (2), 025601 , 2025 2025 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide LJ Xu, X Lin, Q He, M Worku, B Ma Nature communications 11 (1), 4329 , 2020 2020 Citations: 605
Low dimensional metal halide perovskites and hybrids C Zhou, H Lin, Q He, L Xu, M Worku, M Chaaban, S Lee, X Shi, MH Du, ... Materials Science and Engineering: R: Reports 137, 38-65 , 2019 2019 Citations: 518
Highly Efficient Ag 2 O/Bi 2 O 2 CO 3 p-n Heterojunction Photocatalysts with Improved Visible-Light Responsive Activity N Liang, M Wang, L Jin, S Huang, W Chen, M Xu, Q He, J Zai, N Fang, ... ACS applied materials & interfaces 6 (14), 11698-11705 , 2014 2014 Citations: 281
Highly stable organic antimony halide crystals for X-ray scintillation Q He, C Zhou, L Xu, S Lee, X Lin, J Neu, M Worku, M Chaaban, B Ma ACS Materials Letters 2 (6), 633-638 , 2020 2020 Citations: 264
Flower-shaped lithium nitride as a protective layer via facile plasma activation for stable lithium metal anodes K Chen, R Pathak, A Gurung, EA Adhamash, B Bahrami, Q He, H Qiao, ... Energy Storage Materials 18, 389-396 , 2019 2019 Citations: 229
Metal Halide Regulated Photophysical Tuning of Zero‐Dimensional Organic Metal Halide Hybrids: From Efficient Phosphorescence to Ultralong Afterglow LJ Xu, A Plaviak, X Lin, M Worku, Q He, M Chaaban, BJ Kim, B Ma Angewandte Chemie 132 (51), 23267-23271 , 2020 2020 Citations: 190
3D hierarchical FeSe2 microspheres: controlled synthesis and applications in dye-sensitized solar cells S Huang, Q He, W Chen, J Zai, Q Qiao, X Qian Nano Energy 15, 205-215 , 2015 2015 Citations: 155
Improving photovoltaic performance of carbon-based CsPbBr3 perovskite solar cells by interfacial engineering using P3HT interlayer G Wang, W Dong, A Gurung, K Chen, F Wu, Q He, R Pathak, Q Qiao Journal of Power Sources 432, 48-54 , 2019 2019 Citations: 129
Bulk assembly of zero-dimensional organic lead bromide hybrid with efficient blue emission H Lin, C Zhou, M Chaaban, LJ Xu, Y Zhou, J Neu, M Worku, E Berkwits, ... ACS Materials Letters 1 (6), 594-598 , 2019 2019 Citations: 121
Ultrathin FeSe 2 Nanosheets: Controlled Synthesis and Application as a Heterogeneous Catalyst in Dye‐Sensitized Solar Cells S Huang, Q He, W Chen, Q Qiao, J Zai, X Qian Chemistry–A European Journal 21 (10), 4085-4091 , 2015 2015 Citations: 121
0D and 2D: the cases of phenylethylammonium tin bromide hybrids LJ Xu, H Lin, S Lee, C Zhou, M Worku, M Chaaban, Q He, A Plaviak, X Lin, ... Chemistry of Materials 32 (11), 4692-4698 , 2020 2020 Citations: 110
Rationally designed n–n heterojunction with highly efficient solar hydrogen evolution M Xu, T Ye, F Dai, J Yang, J Shen, Q He, W Chen, N Liang, J Zai, X Qian ChemSusChem 8 (7), 1218-1225 , 2015 2015 Citations: 101
Recent progress in improving strategies of inorganic electron transport layers for perovskite solar cells T Zhang, Q He, J Yu, A Chen, Z Zhang, J Pan Nano Energy 104, 107918 , 2022 2022 Citations: 98
Highly efficient and stable perovskite solar cells enabled by low‐cost industrial organic pigment coating Q He, M Worku, H Liu, E Lochner, AJ Robb, S Lteif, JSR Vellore Winfred, ... Angewandte Chemie International Edition 60 (5), 2485-2492 , 2021 2021 Citations: 95
Bulk assembly of multicomponent zero-dimensional metal halides with dual emission C Zhou, S Lee, H Lin, J Neu, M Chaaban, LJ Xu, A Arcidiacono, Q He, ... ACS Materials Letters 2 (4), 376-380 , 2020 2020 Citations: 89
Surface passivation of perovskite thin films by phosphonium halides for efficient and stable solar cells Q He, M Worku, L Xu, C Zhou, S Lteif, JB Schlenoff, B Ma Journal of Materials Chemistry A 8 (4), 2039-2046 , 2020 2020 Citations: 89
Hollow metal halide perovskite nanocrystals with efficient blue emissions M Worku, Y Tian, C Zhou, H Lin, M Chaaban, L Xu, Q He, D Beery, Y Zhou, ... Science Advances 6 (17), eaaz5961 , 2020 2020 Citations: 88
The Role of Mott–Schottky Heterojunctions in Ag–Ag 8 SnS 6 as Counter Electrodes in Dye‐Sensitized Solar Cells Q He, S Huang, C Wang, Q Qiao, N Liang, M Xu, W Chen, J Zai, X Qian ChemSusChem 8 (5), 817-820 , 2015 2015 Citations: 78
Multifunctional flexible AgNW/MXene/PDMS composite films for efficient electromagnetic interference shielding and strain sensing X Bian, Z Yang, T Zhang, J Yu, G Xu, A Chen, Q He, J Pan ACS Applied Materials & Interfaces 15 (35), 41906-41915 , 2023 2023 Citations: 75
Phase control and in situ passivation of quasi-2D metal halide perovskites for spectrally stable blue light-emitting diodes M Worku, Q He, L Xu, J Hong, RX Yang, LZ Tan, B Ma ACS applied materials & interfaces 12 (40), 45056-45063 , 2020 2020 Citations: 75
