Yongyan Pan; Jianan Wang; Zhenxing Sun; Jiaqi Zhang; Zheng Zhou; Chenyang Shi; Sanwan Liu; Fumeng Ren; Rui Chen; Yong Cai; Huande Sun; Bin Liu; Zhongyong Zhang; Zhengjing Zhao; Zihe Cai; Xiaojun Qin; Zhiguo Zhao; Yitong Ji; Neng Li; Wenchao Huang; Zonghao Liu; Wei Chen · 2024 · Nature Communications
Paper
All-perovskite tandem solar cells have shown great promise in breaking the Shockley–Queisser limit of single-junction solar cells. However, the efficiency improvement of all-perovskite tandem solar cells is largely hindered by the surface defects induced non-radiative recombination loss in Sn–Pb mixed narrow bandgap perovskite films. Here, we report a surface reconstruction strategy utilizing a surface polishing agent, 1,4-butanediamine, together with a surface passivator, ethylenediammonium diiodide, to eliminate Sn-related defects and passivate organic cation and halide vacancy defects on the surface of Sn–Pb mixed perovskite films. Our strategy not only delivers high-quality Sn–Pb mixed perovskite films with a close-to-ideal stoichiometric ratio surface but also minimizes the non-radiative energy loss at the perovskite/electron transport layer interface. As a result, our Sn–Pb mixed perovskite solar cells with bandgaps of 1.32 and 1.25 eV realize power conversion efficiencies of 22.65% and 23.32%, respectively. Additionally, we further obtain a certified power conversion efficiency of 28.49% of two-junction all-perovskite tandem solar cells. The efficiency of all-perovskite tandem solar cells is impacted by the nonradiative recombination loss in Sn–Pb mixed narrow bandgap perovskite films. Here, the authors utilize a surface polishing agent with surface passivator to deliver films with a close-to-ideal stoichiometric ratio surface.
Analysis
This study presents a surface reconstruction strategy using 1,4-butanediamine and ethylenediammonium diiodide to improve Sn-Pb mixed perovskite films for all-perovskite tandem solar cells by reducing non-radiative recombination.
Discovery
Constantin Bach; Dong Won Kim; Yitian Du; Yana Vaynzof; Carsten Deibel
Oussama Er-Riyahi; Dorota Biernacka; Yating Guo; Mikel Ballarena Tellechea; Silver-Hamill Turren-Cruz; Dario Bercioux; Meng Li; Agnieszka Lekawa-Raus; Jorge Pascual; Karolina Z. Milowska
Dilfuza Shukurova
Elisabetta Brivio; Luigi Vesce; Andrea Danelli; Sofia Spagnolo; Pierpaolo Girardi
Penglei Sun; Shuyan Chen; Xiang Liu; Longhan Zhang; Huajie You; Chang Yan; Yongqi Zhang; Xiaowen Chu; Tong-yi Zhang
Lai X; Zhang X; Jiang J; Zhao X; Lin Q; Hu G; Chen H; Zhang L; Zhang HM; Xin K; Wei W; Bian H; Wang H; Shen L
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