Yurou Zhang, Mehri Ghasemi, Xiaoming Wen, Minwoo Lee, Xiaoxia Liu, Yalong Jiao, Paul V Bernhardt, Ekyu Han, Tongen Lin, Bo Wei Zhang, Kaijie Xu, Su-Min Lee, Jaesung Yun, Jung Ho Yun, Lianzhou Wang
{"title":"Reversible Structural Transformation of Metastable Lead-Free Organic-Inorganic Hybrid Bismuth Halide Single Crystals","authors":"Yurou Zhang, Mehri Ghasemi, Xiaoming Wen, Minwoo Lee, Xiaoxia Liu, Yalong Jiao, Paul V Bernhardt, Ekyu Han, Tongen Lin, Bo Wei Zhang, Kaijie Xu, Su-Min Lee, Jaesung Yun, Jung Ho Yun, Lianzhou Wang","doi":"10.1039/d4ta04715j","DOIUrl":null,"url":null,"abstract":"Lead-free organic-inorganic hybrid bismuth halides have been recognized as promising alternatives to lead-based perovskites for non-toxic and environmentally-friendly optoelectronic applications. These materials showcase unique optoelectronic properties, ascribed to their low-dimensional electronic structures, such as a long carrier lifetime, a strong quantum-well effect, self-trapped states, and good stability. However, there is still a lack of understanding of the structure dependency of these properties. Investigations of hybrid bismuth halides are thus highly urgent in the pursuit of developing functional optoelectronic devices utilizing these properties. Herein, we report a new one-dimensional (1D) polymeric organic-inorganic hybrid bismuth halide, PDABiI5 (PDA=1,3-propane diammonium), which forms single crystals of centimeter size with a narrow optical bandgap of 1.77 eV. Interestingly, a reversible moisture-induced dimensional transformation was observed on 1D PDABiI5 through its conversion into 0D dimeric (PDA)2Bi2I10·2H2O, coming with a significant bandgap widening and photoluminescence shifts. This transformation is attributed to water molecules forming hydrogen bonds with the ammonium groups, promoting the deformation of Bi−I bonds from [BiI52-]n chains to edge-sharing [Bi2I10]4- dimers. This phenomenon presents exciting prospects for environmentally responsive device applications. Furthermore, optoelectronic characterizations demonstrated a long carrier lifetime exceeding 2 μs, a defect density of 1.49 x 1010 cm−3 and a high μτ product of 4.06 x 10-4 cm2V−1. This work provides insights into the unique properties of PDABiI5 and (PDA)2Bi2I10·2H2O and their structure-property correlation, and offers promising avenues for the development of eco-friendly and functional optoelectronic devices.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta04715j","RegionNum":2,"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
Lead-free organic-inorganic hybrid bismuth halides have been recognized as promising alternatives to lead-based perovskites for non-toxic and environmentally-friendly optoelectronic applications. These materials showcase unique optoelectronic properties, ascribed to their low-dimensional electronic structures, such as a long carrier lifetime, a strong quantum-well effect, self-trapped states, and good stability. However, there is still a lack of understanding of the structure dependency of these properties. Investigations of hybrid bismuth halides are thus highly urgent in the pursuit of developing functional optoelectronic devices utilizing these properties. Herein, we report a new one-dimensional (1D) polymeric organic-inorganic hybrid bismuth halide, PDABiI5 (PDA=1,3-propane diammonium), which forms single crystals of centimeter size with a narrow optical bandgap of 1.77 eV. Interestingly, a reversible moisture-induced dimensional transformation was observed on 1D PDABiI5 through its conversion into 0D dimeric (PDA)2Bi2I10·2H2O, coming with a significant bandgap widening and photoluminescence shifts. This transformation is attributed to water molecules forming hydrogen bonds with the ammonium groups, promoting the deformation of Bi−I bonds from [BiI52-]n chains to edge-sharing [Bi2I10]4- dimers. This phenomenon presents exciting prospects for environmentally responsive device applications. Furthermore, optoelectronic characterizations demonstrated a long carrier lifetime exceeding 2 μs, a defect density of 1.49 x 1010 cm−3 and a high μτ product of 4.06 x 10-4 cm2V−1. This work provides insights into the unique properties of PDABiI5 and (PDA)2Bi2I10·2H2O and their structure-property correlation, and offers promising avenues for the development of eco-friendly and functional optoelectronic devices.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.