Flexible perovskite solar cells based on vacuum-assisted crystallization process
Sang-Heon Lee a, Do-Ha Kim a, Sung-Nam Kwon a, Seok-In Na a
a Jeonbuk National University, South Korea, Jeonju, Korea, Republic of
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
London, United Kingdom, 2023 June 12th - 14th
Organizers: Tracey Clarke, James Durrant and Trystan Watson
Poster, Sang-Heon Lee, 268
Publication date: 30th March 2023

Perovskite solar cells are attracting attention as next-generation solar cells due to their high efficiency and low manufacturing costs. Furthermore, flexible perovskite solar cells (f-PSCs) with light weight and bendable characteristics are rising as advanced energy sources in the field of mobile and architectural applications. However, f-PSCs have not yet reached the efficiency of rigid PSCs. This is because high-performance hole transport layer (HTL) materials such as NiOX require high-temperature annealing, making them inapplicable to flexible substrates that can be processed at low temperatures, and because perovskite layers do not form well on self-assembling molecular thin films with hydrophobic nature used as charge transport layers. To address these issues, in this study, we applied a vacuum-assisted crystallization process to deposit HTL and a perovskite layer. The vacuum-assisted crystallization process enabled annealing-free deposition of self-assembling molecular thin films and formation of uniform perovskite layers with high crystallinity, resulting in improved device performance. The findings of this study provide a detailed analysis of the impact of the vacuum-assisted crystallization process and the formation of thin films on the performance of flexible perovskite solar cells.

This work was supported by the National Research Foundation (NRF) of Korea (NRF-2021R1A2C2010353 and 2020R1I1A1A01051961) and the Korea Electric Power Corporation (CX72220014). 

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