TY - JOUR
T1 - Enhanced Performance of Perovskite Solar Cells via Multifunctional Carbon Quantum Dot Modification
AU - Liu, Jing
AU - Cai, Wanxian
AU - Yin, Yanfeng
AU - Wang, Minhuan
AU - Zhang, Jie
AU - Qamar, Samina
AU - Zheng, Xiujie
AU - Guo, Hao
AU - Liu, Na
AU - Li, Shukui
AU - Bian, Jiming
AU - Shi, Yantao
AU - Cai, Wanqing
N1 - Publisher Copyright:
Copyright © 2025 Jing Liu et al.
PY - 2025
Y1 - 2025
N2 - Numerous defects on the surface of halide perovskite films considerably limit the photovoltaic efficacy of perovskite solar cells (PSCs). Herein, multifunctional carbon quantum dots (CQDs) were introduced to modify the perovskite film surface. The CQDs contain multiple functional groups, including C=O and –NH2, that interact effectively with the uncoordinated Pb2+ and organic cations on the perovskite film surface. This interaction enables defect passivation and energy-level alignment optimization, leading to an extension of the charge carrier lifetime and enhancement of carrier-selective transfer. As a result, the best CQD-modified PSCs, boasting an impressive fill factor of 84.5%, achieved a power conversion efficiency of 24.48%, surpassing the 22.31% of pristine devices. In addition, the unencapsulated PSCs exhibit excellent stability, retaining 83% of the initial efficiency after operating for over 1,000 h under simulated AM 1.5G illumination.
AB - Numerous defects on the surface of halide perovskite films considerably limit the photovoltaic efficacy of perovskite solar cells (PSCs). Herein, multifunctional carbon quantum dots (CQDs) were introduced to modify the perovskite film surface. The CQDs contain multiple functional groups, including C=O and –NH2, that interact effectively with the uncoordinated Pb2+ and organic cations on the perovskite film surface. This interaction enables defect passivation and energy-level alignment optimization, leading to an extension of the charge carrier lifetime and enhancement of carrier-selective transfer. As a result, the best CQD-modified PSCs, boasting an impressive fill factor of 84.5%, achieved a power conversion efficiency of 24.48%, surpassing the 22.31% of pristine devices. In addition, the unencapsulated PSCs exhibit excellent stability, retaining 83% of the initial efficiency after operating for over 1,000 h under simulated AM 1.5G illumination.
UR - http://www.scopus.com/inward/record.url?scp=105003746952&partnerID=8YFLogxK
U2 - 10.34133/energymatadv.0197
DO - 10.34133/energymatadv.0197
M3 - Article
AN - SCOPUS:105003746952
SN - 2692-7640
VL - 6
JO - Energy Material Advances
JF - Energy Material Advances
M1 - 0197
ER -
