Sagar Bhattarai
Verified @gmail.com
Scientist & Innovator
Indian Institute of Technology Guwahati
Dr. Sagar Bhattarai is a distinguished scientist, researcher, and innovator at the Indian Institute of Technology Guwahati, where he focuses on cutting-edge photovoltaic and perovskite solar cell technologies. He holds a Ph.D. from the National Institute of Technology Arunachal Pradesh, and has previously served as the Head of the Physics Department at Arunachal University of Studies.
Classified as one of the world’s top 2% scientists by Stanford University (2024), Dr. Bhattarai has contributed extensively to the field of renewable energy, publishing over 50 research papers in top-tier journals. His work involves the development of high-efficiency solar cells, which are critical for the advancement of sustainable energy solutions.
He is also an editor at Springer Nature, and his research focuses on innovative approaches in optoelectronics and solar energy materials. Dr. Bhattarai is passionate about using his expertise to tackle global energy challenges.
EDUCATION
PhD in Physics
RESEARCH, TEACHING, or OTHER INTERESTS
Energy, Fuel Technology, Materials Science, Biomaterials
FUTURE PROJECTS
Perovskite solar cells
Researchers worldwide have been interested in perovskite solar cells (PSCs) due to their exceptional photovoltaic (PV) performance. The PSCs are the next generation of the PV market as they can produce power with performance that is on par with the best silicon solar cells while costing less than silicon solar cells. The efficiency of PSCs has increased from 3.81% to 25.7% within a decade, demonstrating their immense potential. In this review, the advantages of PSCs and the evolution of efficiency with various configuration are summarized and discussed. The manufacture of PSCs on a large scale and the fabrication of perovskite films are described as well. Despite their advantages, PSCs have encountered numerous problems, including toxicity and degradation in the presence of moisture, oxygen, and UV light. Thus, we emphasize this line added to the difficulties preventing the commercialization of PSCs, as well as the road map towards commercialization are thoroughly examined.
Applications Invited
Renewable Energy
Applications Invited
Tandem solar cell, Quantum Dot solar cell
Applications Invited
Scopus Publications
Scopus Publications
Sagar Bhattarai, K Deepthi Jayan, Pranjal Barman, Abhinav Kumar, S. E. Shcheklein, Ankit Sharma, and Girija Shankar Sahoo
Springer Science and Business Media LLC
Sagar Bhattarai, Roshni Banthia, Abhinav Kumar, Ahmet Sait Alali, D. K. Dwivedi, Bhaben Tanti, Madhusudan Maiti, and Suddhendu DasMahapatra
Springer Science and Business Media LLC
Abderrahim Yousfi, Okba Saidani, Raouf Zerrougui, Tarek Assassi, Sagar Bhattarai, Md. Ferdous Rahman, and Girija Shankar Sahoo
Elsevier BV
Junu Poudel, Sagar Bhattarai, Hemen Kalita, Namita Nath, and Bhaben Tanti
Elsevier BV
Abderrahim Yousfi, Okba Saidani, Yehya Belhadad, Rafik Zouache, Abdelhalim Brahimi, Sagar Bhattarai, and Girija Shankar Sahoo
Elsevier BV
Kumar Neupane, Pratap Kumar Dakua, Jayant Kumar Sahu, Subba Rao Polamuri, Amit Ved, M. Chethan, D.V.N. Ananth, Raj Kumar, Hemasri Karri, and Sagar Bhattarai
Elsevier BV
Himanshu R. Das, Haraprasad Mondal, Sagar Bhattarai, Mohammad Soroosh, and Eshan Adibnia
Springer Science and Business Media LLC
Sagar Bhattarai, Pratap Kumar Dakua, Mohd Zahid Ansari, Usen Dudekula, Rahul Pandey, Ismail Hossain, and Ayman A. Ghfar
Springer Science and Business Media LLC
K. Deepthi Jayan and Sagar Bhattarai
Elsevier BV
Kumar Neupane, Sagar Bhattarai, Nitumoni Deka, Ahmet Sait Alali, Abderrahim Yousfi, Okba Saidani, Md. Ferdous Rahman, Abhinav Kumar, and Hanen Karamti
Springer Science and Business Media LLC
Mustafa K. A. Mohammed, Amel Muhson Naji, Duha S. Ahmed, Mataz J. Jamai, Ethar Yahya Salih, M. Dehghanipour, Sagar Bhattarai, Rahul Pandey, Jaya Madan, and Md. Ferdous Rahman
Springer Science and Business Media LLC
Lina Merzougui, Mostefa Benhaliliba, and Sagar Bhattarai
Periodica Polytechnica Budapest University of Technology and Economics
This study presents a thorough optimization approach for Cu/ZnO/P3HT/Pt hybrid solar cells (HSCs), providing insights into the interactions of several crucial parameters. Significant performance improvements are attained by carefully adjusting the absorber and electron transport layer (ETL). Enhancement of open-circuit voltage (VOC) and reduction in recombination represent principal mechanisms by which precise aluminum doping in ZnO contributes to increased power conversion efficiency (PCE). In our simulations, an aluminum doping concentration of 4% in ZnO, an ETL thickness optimized at 0.004 µm, and an electron affinity set to 4.25 eV (the energy released when an electron binds to a neutral atom or molecule) together improve the PCE.A critical finding is the identification of an optimal absorber layer thickness (2.5 µm), which achieves a maximum PCE of 16.82%. An examination of the interface fault density revealed a critical threshold of 1013 1/cm2, above which the performance started to decline quickly. The ideal operating point is found to be 313 K based on temperature-dependent research, with a peak PCE of 17.13%. Integrating advanced current-voltage characterization, innovative band alignment studies, and comprehensive temperature-dependent analyses, this work advances the theoretical framework for optimizing HSCs.This research opens new avenues for the rational design of high-efficiency photovoltaics and highlights the transformative potential of multiparameter optimization and interface engineering in next-generation solar technologies.
Pranjal Barman, Anamika Kalita, Pallab Sarmah, Sagar Bhattarai, Sushanta Bordoloi, and Farrukh Khalid
Elsevier BV
Ayesha Sultana, Haraprasad Mondal, Himanshu Das, Mohammad Soroosh, and Sagar Bhattarai
Springer Science and Business Media LLC
Dheeraj Kumar Dhaked, V.L. Narayanan, Ram Gopal, Omveer Sharma, Sagar Bhattarai, and S.K. Dwivedy
Elsevier BV
Abderrahim Yousfi, Okba Saidani, Rachid Bennia, Fatma Saad Saoud, Lamir Saidi, Sagar Bhattarai, Md. Rasidul Islame, Md. Ferdous Rahman, and Girija Shankar Sahoo
Springer Science and Business Media LLC
Sagar Bhattarai, K. Deepthi Jayan, Prakash Kanjariya, Pawan Sharma, Ramneet Kaur, Jaya Madan, Mohd Zahid Ansari, Saikh Mohammad Wabaidur, and Rahul Pandey
Elsevier BV
Gagan Kumar, Babban Kumar Ravidas, Sagar Bhattarai, Mukesh Kumar Roy, and Dip Prakash Samajdar
Elsevier BV
Basra Sultana, Abu Bakkar, Okba Saidani, Sagar Bhattarai, Ahmad Irfan, and Md. Ferdous Rahman
Elsevier BV
Md. Al Ijajul Islam, Md. Ferdous Rahman, Tanvir Al Galib, Mustafa K. A. Mohammed, Sagar Bhattarai, and Ahmad Irfan
Royal Society of Chemistry (RSC)
This study investigates the effects of M-anion modifications on lead-free halide inorganic compounds, specifically Ba3MCl3 (M = N, P, As, Sb), using DFT and SCAPS-1D software.
Junu Poudel, Sagar Bhattarai, Namita Nath, and Bhaben Tanti
Elsevier BV
Lalruat Sanga, Celestine Lalengmawia, Zosiamliana Renthlei, Sougaijam Thasana Chanu, Lalhum Hima, Ningthoujam Surajkumar Singh, Andre Yvaz, Sagar Bhattarai, and D.P. Rai
Elsevier BV
Sumit Sagar, Sagar Bhattarai, Jitendra Kumar, Amitesh Kumar, and Samrat Mukhopadhyay
Elsevier BV
Pratap Kumar Dakua, Neravati Nagaraja Kumar, Subbulakshmi Ganesan, Junainah Abd Hamid, M. Ravi Kumar, Suman Saini, Piyus Kumar Pathak, Ahmed Alkhayyat, and Sagar Bhattarai
Springer Science and Business Media LLC
I. Hossain, A. T. Ngoupo, S. Bhattarai, S. P. Challagulla, and S. K. Sharma
Springer Science and Business Media LLC
RECENT SCHOLAR PUBLICATIONS
GRANT DETAILS
1. Large scale production of energy from organic solar cell for the utilization in underwater surveillance, from Indian Institute of Technology Guwahati as Principal Investigator, Funding: 19 Lakh INR
2. Development and characterization of CsSnGeI3 based solar cell devices through theoretical and experimental approach, from DST-SERB, Core Research Grant as Co-Principal Investigator, Funding: 49 Lakh INR