{"title":"Low-Temperature Processed CsPbI3 for Flexible Perovskite Solar Cells Through Cs─I bond Weakening","authors":"Xuemin Guo, Wenxiao Zhang, Haobo Yuan, Zhengbo Cui, Wen Li, Ting Shu, Yunfei Li, Bo Feng, Yuyang Hu, Xiaodong Li, Junfeng Fang","doi":"10.1002/aenm.202404293","DOIUrl":null,"url":null,"abstract":"All-inorganic triiodide cesium lead (CsPbI<sub>3</sub>) exhibits huge potential in perovskite solar cells (PSCs). However, the high-temperature crystallization process (≈340 or 180 °C) limits their further development, especially in flexible PSCs. Here, a Cs─I bond weakening approach is proposed to realize the low-temperature crystallization of CsPbI<sub>3</sub> by introducing organic sulfonate of 1-propylsulfonate-3-methylimidazolium chloride (SMCl). SMCl can strongly interact with CsI and weaken the Cs─I bond to dissociate free I<sup>−</sup> ions for the effective transition of initial PbI<sub>2</sub> to [PbI<sub>6</sub>]<sup>4−</sup>, which greatly decreases the crystallization temperature of black CsPbI<sub>3</sub> to 90 °C. As a result, flexible PSCs are realized with efficiency of 13.86%, which is the highest efficiency of flexible CsPbI<sub>3</sub> devices. Besides, SMCl will also help to release the tensile strain and stabilize CsPbI<sub>3</sub> phase, leading to good thermal and mechanical stability. Almost no efficiency loss is observed in flexible PSCs after 36000 bending cycles with a curvature radius of 5 mm.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":null,"pages":null},"PeriodicalIF":24.4000,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aenm.202404293","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
All-inorganic triiodide cesium lead (CsPbI3) exhibits huge potential in perovskite solar cells (PSCs). However, the high-temperature crystallization process (≈340 or 180 °C) limits their further development, especially in flexible PSCs. Here, a Cs─I bond weakening approach is proposed to realize the low-temperature crystallization of CsPbI3 by introducing organic sulfonate of 1-propylsulfonate-3-methylimidazolium chloride (SMCl). SMCl can strongly interact with CsI and weaken the Cs─I bond to dissociate free I− ions for the effective transition of initial PbI2 to [PbI6]4−, which greatly decreases the crystallization temperature of black CsPbI3 to 90 °C. As a result, flexible PSCs are realized with efficiency of 13.86%, which is the highest efficiency of flexible CsPbI3 devices. Besides, SMCl will also help to release the tensile strain and stabilize CsPbI3 phase, leading to good thermal and mechanical stability. Almost no efficiency loss is observed in flexible PSCs after 36000 bending cycles with a curvature radius of 5 mm.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.