Eunyoung Choi

Eunyoung Choi studied for her PhD under the supervision of Prof. Martin Green and Dr. Jae Sung Yun at the School of Photovoltaic and Renewable Energy Engineering, University of New South Wales (UNSW). During her PhD journey at UNSW, she focused on investigating nanoscale optoelectronic properties of kesterite and perovskite solar cells by using advanced scanning probe microscopy. Now she works as a postdoctoral research associate at Beamline 14, Diamond Light Source Ltd., and is involved in Sam Stranks group at the University of Cambridge after Jan. 2023. She is exploring the correlation between nanoscale strains in perovskite materials and perovskite solar cells (PSCs) and is conducting an operando study in PSCs by using synchrotron X-ray techniques.

My primary research interests are investigating perovskite properties at nanoscale. To date, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has exceeded over 25%. However, PSCs are vulnerable to internal and external strains because of the intrinsic soft nature of perovskite, which hinders the commercialisation of PSCs. In addition, it has been revealed that locally inhomogeneous chemical composition or phases in perovskites can significantly contribute to PSCs’ performance and stability. This brings the importance of understanding nanoscale behaviour in perovskite to achieve high PSCs with long-term stability. Hence, I focus on investigating the fundamental correlation between local properties in perovskite and device performance by using a nanoprobe beamline. I also develop adequate procedures to measure operational devices with beamline. Last, by using optimised methods, I perform operando studies on perovskite-based optoelectronic devices.

Updated publication profiles could be accessed online at Google Scholar and ResearchGate, respectively. [https://scholar.google.co.kr/citations?user=8NPUYOkAAAAJ&hl=ko] [https://www.researchgate.net/profile/Eunyoung-Choi-6]

1. Eunyoung Choi1, Yurou Zhang1, Arman Mahboubi Soufiani, Minwoo Lee, Richard Francis Webster, Michael E. Pollard, Peter John Reece, Wonjong Lee, Jan Seidel, Jongchul Lim* Jung-Ho Yun* and Jae Sung Yun* “Exploration of sub-bandgap states in 2D halide perovskite single-crystal photodetector”, npj 2D materials and applications, 2022, 6, 43

2. Minwoo Lee1, Eunyoung Choi1, Jihoo Lim, Arman Mahboubi Soufiani, Moonyong Kim, Daniel Chen, Martin A. Green, Jan Seidel, Sean Lim, Jincheol Kim, Xinchen Dai, Robert Lee-Chin, Bolin Zheng, Ziv Hameiri, Jongsung Park*, Xiaojing Hao* and Jae Sung Yun*, “Enhanced Hole-Carrier Selectivity in Wide Bandgap Halide Perovskite PV Devices for Indoor IoT Applications”, Advanced Functional Materials, 2021, 2008908

3. Vijay Karade1, Eunyoung Choi1, Myeng Gil Gang, Hyesun Yoo, Abhishek lokhande, Pravin Babar, Jun Sung Jang, Jaesung Yun, Jongsung Park*and Jin hyeok Kim*, “Achieving low VOC-deficit characteristics in Cu2ZnSn(S,Se)4 solar cells through improved carrier separation”, ACS Applied Materials & Interfaces, 2021, 13, 429-437

4. Eun Young Choi, Ju-Hee Kim, Bu-Jong Kim, Ji Hun Jang, Jincheol Kim* and Nochang Park*, “Development of Moisture-Proof Polydimethylsiloxane/Aluminum Oxide Film and Stability Improvement of Perovskite Solar Cells Using the Film”, RSC advances, 2019, 9, 11737-11744

5. Eun Young Choi, Jincheol Kim, Sean Lim, Ekyu Han, Anita W.Y. Ho-Baillie* and Nochang Park*, “Enhancing stability for organic-inorganic perovskite solar cells by atomic layer deposited Al2O3 encapsulation”, Sol. Energy Mater Sol. Cells, 2018, 188, 37-45

6. Eun Young Choi, Seung Hun Eom, Chang Eun Song, So Youn Nam, Jaemin Lee, Han Young Woo, In Hwan Jung*, Sung Cheol Yoon* and Changjin Lee*, “Synthesis and Characterization of a wide bandgap polymer based on a weak donor-weak acceptor structure for dual applications in organic solar cells and organic photodetectors”, Organic Electronics, 2017, 46, 173-182

7. Eun Young Choi, So Youn Nam, Chang Eun Song, Ki-Jeong Kong, Changjin Lee, In Hwan Jung* and Sung Cheol Yoon*, “Development of a julolidine-based interfacial modifier for efficient inverted polymer solar cells”, RSC Advances., 2015, 5, 107540-107546