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. 2024 Nov;36(46):e2408448.
doi: 10.1002/adma.202408448. Epub 2024 Sep 27.

Solution-Processed Micro-Nanostructured Electron Transport Layer via Bubble-Assisted Assembly for Efficient Perovskite Photovoltaics

Yongrui Yang  1   2 , Fanyi Min  1   2 , Yiyang Wang  2   3 , Lutong Guo  1   2 , Haoran Long  2   4 , Zhiyuan Qu  1   2 , Kun Zhang  1   2 , Yang Wang  1   2 , Juehan Yang  2   4 , Yu Chen  5 , Lei Meng  2   3 , Yali Qiao  1   2 , Yanlin Song  1   2
Affiliations

Solution-Processed Micro-Nanostructured Electron Transport Layer via Bubble-Assisted Assembly for Efficient Perovskite Photovoltaics

Yongrui Yang et al. Adv Mater. 2024 Nov.

Abstract

Organic-inorganic halide perovskite solar cells (PSCs) have attracted significant attention in photovoltaic research, owing to their superior optoelectronic properties and cost-effective manufacturing techniques. However, the unbalanced charge carrier diffusion length in perovskite materials leads to the recombination of photogenerated electrons and holes. The inefficient charge carrier collecting process severely affects the power conversion efficiency (PCE) of the PSCs. Herein, a solution-processed SnO2 array electron transport layer with precisely tunable micro-nanostructures is fabricated via a bubble-template-assisted approach, serving as both electron transport layers and scaffolds for the perovskite layer. Due to the optimized electron transporting pathway and enlarged perovskite grain size, the PSCs achieve a PCE of 25.35% (25.07% certificated PCE).

Keywords: bubble‐assisted patterning; charge carrier dynamics; micro‐nanostructured interface; perovskite photovoltaics; solar cells.

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