Molecule doping enabled high-performance inverted perovskite solar cells
Xiaoming Chang a, Thomas Anthopoulos a
a King Abdullah University of Science and Technology (KAUST), Saudi Arabia
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
Tokyo, Japan, 2024 January 21st - 23rd
Organizers: Qing Shen and James Ryan
Poster, Xiaoming Chang, 062
Publication date: 18th October 2023

Inverted perovskite solar cells (p-i-n) have achieved PCEs exceeding 25%, comparable to n-i-p perovskite solar cells. However, improving their performance is still necessary to fully realize their potential.  This study demonstrates the effectiveness of molecular doping in enhancing the performance of inverted metal halide perovskite solar cells. The addition of the small molecule n-dopant, EV, to the perovskite solution significantly reduces trap formation and improves energy band alignment, resulting in a power conversion efficiency of 24.07% and a fill factor of 83%. Furthermore, the doped devices demonstrate good stability, maintaining a rate of about 91% after 1920 hours in an N2 atmosphere and 75% after 1000 hours at 85℃ in an N2 atmosphere, even without encapsulation. These findings highlight the potential of molecular doping as a promising strategy to optimize the performance of inverted perovskite solar cells, leading to the development of highly efficient perovskite-based photovoltaic devices.

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