Electronic Resource
A-site cation influence on the conduction band of lead bromide perovskites
| العنوان: | A-site cation influence on the conduction band of lead bromide perovskites |
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| المؤلفون: | Man, Gabriel J., Kamal, Chinnathambi, Kalinko, Aleksandr, Phuyal, Dibya, Acharya, Joydev, Mukherjee, Soham, Nayak, Pabitra K., Rensmo, Håkan, Odelius, Michael, Butorin, Sergei M. |
| بيانات النشر: | Stockholms universitet, Fysikum Raja Ramanna Centre for Advanced Technology, India; Homi Bhabha National Institute, India 2022 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Hot carrier solar cells hold promise for exceeding the Shockley-Queisser limit. Slow hot carrier cooling is one of the most intriguing properties of lead halide perovskites and distinguishes this class of materials from competing materials used in solar cells. Here we use the element selectivity of high-resolution X-ray spectroscopy and density functional theory to uncover a previously hidden feature in the conduction band states, the sigma-pi energy splitting, and find that it is strongly influenced by the strength of electronic coupling between the A-cation and bromide-lead sublattice. Our finding provides an alternative mechanism to the commonly discussed polaronic screening and hot phonon bottleneck carrier cooling mechanisms. Our work emphasizes the optoelectronic role of the A-cation, provides a comprehensive view of A-cation effects in the crystal and electronic structures, and outlines a broadly applicable spectroscopic approach for assessing the impact of chemical alterations of the A-cation on perovskite electronic structure. The A-cation influence on the mechanism of slow hot carrier cooling in perovskites is controversial. Here, Man et al. resolve a debated issue regarding A-cation influence on the electronic structure of lead halide perovskites. |
| مصطلحات الفهرس: | Chemical Sciences, Kemi, Article in journal, info:eu-repo/semantics/article, text |
| DOI: | 10.1038.s41467-022-31416-y |
| URL: | Nature Communications, 2022, 13:1 |
| الاتاحة: | Open access content. Open access content info:eu-repo/semantics/restrictedAccess |
| ملاحظة: | English |
| Other Numbers: | UPE oai:DiVA.org:su-208299 0000-0002-4546-8219 0000-0002-7023-2486 doi:10.1038/s41467-022-31416-y PMID 35787623 ISI:000820771400022 Scopus 2-s2.0-85133271664 1356421637 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1356421637 |
| قاعدة البيانات: | OAIster |
| DOI: | 10.1038.s41467-022-31416-y |
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