Quantum Dots Mediated Crystallization Enhancement in Two‑Step Processed Perovskite Solar Cells  

作　　者：Heng Liu Geyu Jin Jiantao Wang Weihai Zhang Long Qing Yao Zhang Qiongqiong Lu Pengfei Yue Guoshang Zhang Jing Wei Hongbo Li Hsing‑Lin Wang 

机构地区：[1]Henan Key Laboratory of Advanced Conductor Materials,Institute of Materials,Henan Academy of Sciences,Zhengzhou 450046,People’s Republic of China [2]Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,People’s Republic of China [3]Beijing Key Laboratory of Construction‑Tailorable Advanced Functional Materials and Green Applications,Experimental Center of Advanced Materials,School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,People’s Republic of China [4]College of New Energy,Ningbo University of Technology,Ningbo 315336,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第7期342-354,共13页纳微快报(英文版)

基　　金：supported by the Startup Research-Fund of Henan Academy of Sciences(grant number 241817242);Shenzhen Fundamental Research Scheme-General Program(JCYJ20220818100217037);Key University Laboratory of Highly Efficient Utilization of Solar Energy,Sustainable Development of Guangdong,Southern University of Science and Technology,Shenzhen 518055,China(Y01256331);the National Natural Science Foundation of China(22379017,22179009,U22A2072);supported by the Pico Center at SUSTech CRF which receives support from the Presidential Fund and Development and Reform Commission of Shenzhen Municipality.

摘　　要：Hybrid organic–inorganic lead halide perovskites have emerged as a promising material for high-efficiency solar cells,yet challenges related to crystallization and defects limit their performance and stability.This study investigates the use of perovskite quantum dots(QDs)as crystallization seeds to enhance the quality of FAPbI_(3)perovskite films and improve the performance of perovskite solar cells(PSCs).We demonstrate that CsPbI_(3)and CsPbBr_(3)QDs effectively guide the crystallization process,leading to the formation of larger crystals with preferential orientations,particularly the(001)and(002)planes,which are associated with reduced defect densities.This seedmediated growth strategy resulted in PSCs with power conversion efficiencies(PCEs)of 24.75%and 24.11%,respectively,compared to the baseline efficiency of 22.05%for control devices.Furthermore,devices incorporating QD-treated perovskite films exhibited remarkable stability,maintaining over 80%of their initial PCE after 1000 h of simulated sunlight exposure,a significant improvement over the control.Detailed optoelectronic characterization revealed reduced non-radiative recombination and enhanced charge transport in QD-treated devices.These findings highlight the potential of QDs as a powerful tool to improve perovskite crystallization,facet orientation,and overall device performance,offering a promising route to enhance both efficiency and stability in PSCs.

关 键 词：Quantum dots Perovskite solar cells TWO-STEP CRYSTALLIZATION Efficiency Stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动]