{"title":"将有机太阳能电池中的追光现象与电荷收集损耗联系起来","authors":"Eunchi Kim, Leonard Christen, Thomas Kirchartz","doi":"10.1002/aenm.202403129","DOIUrl":null,"url":null,"abstract":"The low charge carrier mobility of molecular materials is one of the key obstacles to achieving higher efficiencies in organic photovoltaics. Therefore, understanding and quantifying charge collection losses owing to low mobility is an important challenge in organic photovoltaics and other emerging photovoltaic technologies. Here, an approach is proposed to use the photoshunt and its dependence on light intensity as an easily accessible indicator of charge-collection losses. The physical meaning of the photoshunt is explored using drift-diffusion simulations and an analytical model. The results show that the recombination current visible as the photoshunt is decreasing with increasing charge carrier mobility. Furthermore, a framework is presented for evaluating the short-circuit current losses in experimental data using a photoshunt. The study reveals that the charge-collection efficiency at shortcircuit is strongly influenced by the charge carrier mobility and light intensity.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":null,"pages":null},"PeriodicalIF":24.4000,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Correlating the Photoshunt with Charge-Collection Losses in Organic Solar Cells\",\"authors\":\"Eunchi Kim, Leonard Christen, Thomas Kirchartz\",\"doi\":\"10.1002/aenm.202403129\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The low charge carrier mobility of molecular materials is one of the key obstacles to achieving higher efficiencies in organic photovoltaics. Therefore, understanding and quantifying charge collection losses owing to low mobility is an important challenge in organic photovoltaics and other emerging photovoltaic technologies. Here, an approach is proposed to use the photoshunt and its dependence on light intensity as an easily accessible indicator of charge-collection losses. The physical meaning of the photoshunt is explored using drift-diffusion simulations and an analytical model. The results show that the recombination current visible as the photoshunt is decreasing with increasing charge carrier mobility. Furthermore, a framework is presented for evaluating the short-circuit current losses in experimental data using a photoshunt. The study reveals that the charge-collection efficiency at shortcircuit is strongly influenced by the charge carrier mobility and light intensity.\",\"PeriodicalId\":111,\"journal\":{\"name\":\"Advanced Energy Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":24.4000,\"publicationDate\":\"2024-10-03\",\"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.202403129\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aenm.202403129","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}
Correlating the Photoshunt with Charge-Collection Losses in Organic Solar Cells
The low charge carrier mobility of molecular materials is one of the key obstacles to achieving higher efficiencies in organic photovoltaics. Therefore, understanding and quantifying charge collection losses owing to low mobility is an important challenge in organic photovoltaics and other emerging photovoltaic technologies. Here, an approach is proposed to use the photoshunt and its dependence on light intensity as an easily accessible indicator of charge-collection losses. The physical meaning of the photoshunt is explored using drift-diffusion simulations and an analytical model. The results show that the recombination current visible as the photoshunt is decreasing with increasing charge carrier mobility. Furthermore, a framework is presented for evaluating the short-circuit current losses in experimental data using a photoshunt. The study reveals that the charge-collection efficiency at shortcircuit is strongly influenced by the charge carrier mobility and light intensity.
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.