Interface Control and Printing Fabrication for Highly Efficient Flexible Perovskite Solar Cells
Junliang Yang a
a School of Physics and Electronics, Central South University Changsha 410083, China,410083
Proceedings of International Online Conference on Hybrid Materials and Optoelectronic Devices (HYBRIDOE21)
Online, Spain, 2021 December 15th - 17th
Organizers: Jinwei Gao, Hua Yu, Dewei Zhao, Haizheng Zhong, Hairen Tan and Xueqing Xu
Invited Speaker, Junliang Yang, presentation 017
Publication date: 3rd December 2021

Flexible perovskite solar cells (f-PSCs) have great potential prospects in flexible energy and mobile energy systems. Rigid PSCs have made important progress, and the power conversion efficiency (PCE) has exceeded 25%, but the PCE of f-PSCs is still much lower than rigid ones. Based on the device structure of PEN/ITO/SnO2/FAMAPbBrxI3-x/Spiro- OMeTAD/Ag, the PCEs up to 19.51% were achieved through the precise control on electron transport layer SnO2[1]. Furthermore, CF3PEAI molecule was introduced to construct 2D perovskite modified layer between 3D perovskite and hole transport layer[2]. It could passivate 3D perovskite film defects, adjust energy level structure between perovskite and hole transport layer and improve 3D perovskite charge transport performance, leading to the PCEs up to 21.1% (verified PCE was 20.5%). The f-PSCs exhibited excellent stability and bending resistance. Meanwhile, based on ink formula regulation and interface optimization, efficient f-PSCs were fabricated by roll-to-roll printing process, showing potential application prospects [3].

The work was supported by the National Key Research and Development Program of China (2017YFA0206600), the National Natural Science Foundation of China (52173192), the Science and Technology Innovation Program of Hunan Province (2020RC4004) and the Special Funding for the Construction of Innovative Provinces in Hunan Province (2020GK2024).

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