Electron transport layer interface control based on n-i-p perovskite solar cells for indoor lighting applications
So Jeong Shin a, Min woo Lee b, Jae Sung Yun b c, Jong H. Kim a
a Department of Molecular Science and Technology, Ajou University, Suwon 443-749 (Korea)
b University of New South Wales, Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Engineering, Sydney 2052, Sydney, Australia
c Advanced Technology Institute, Department of Electrical and Electronic Engineering, University of Surrey, Guildford, Surrey GU2 7XH, UK
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, So Jeong Shin, 252
Publication date: 30th March 2023

Indoor photovoltaics (IPVs) is expected to be widely applicable to operate low-power Internet of Things (IoT) electronics used in indoor environment, which makes IPVs attractive as an emerging sustainable energy harvester. Among various photovoltaic materials, perovskites exhibit promising indoor power conversion efficiency (iPCE) because of their compelling optoelectronic advantages over the other materials.

In this study, we developed a simple and effective interface treatment of perovskite solar cells (PSCs) for improving iPCE under low-intensity LED light. We passivated traps at the surface of electron transport SnO layer by layering RbI. This treatment significantly reduced charge recombination at the SnO/perovskite interface, which enabled considerable enhancement of iPCE of PSCs from 32.12 to 35.13 % under 1000 lux LED. More specifically, through systemic characterizations we systemically revealed that reduced interface recombination improved open circuit voltage and charge extraction property at indoor light illumination condition. These findings suggest that simple interface treatment using RbI can be a useful strategy for the iPCE optimization of indoor PSCs.

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