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A-site cation influ...
A-site cation influence on the conduction band of lead bromide perovskites
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- Man, Gabriel J. (author)
- Uppsala universitet,Energimaterialens fysik,GJM Sci Consulting, Ft Lee, NJ 07024 USA.
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- Kamal, Chinnathambi (author)
- Stockholms universitet,Fysikum,Raja Ramanna Centre for Advanced Technology, India; Homi Bhabha National Institute, India,Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, S-10691 Stockholm, Sweden.;Raja Ramanna Ctr Adv Technol, Theory & Simulat Lab, HRDS, Indore 452013, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India.
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- Kalinko, Aleksandr (author)
- Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany.
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- Phuyal, Dibya, 1985- (author)
- KTH,Material- och nanofysik,KTH Royal Inst Technol, Div Mat & Nano Phys, Dept Appl Phys, S-10691 Stockholm, Sweden.
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- Acharya, Joydev (author)
- Tata Inst Fundamental Res, Hyderabad 500046, India.
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- Mukherjee, Soham (author)
- Uppsala universitet,Energimaterialens fysik
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- Nayak, Pabitra K. (author)
- Tata Inst Fundamental Res, Hyderabad 500046, India.
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- Rensmo, Håkan (author)
- Uppsala universitet,Energimaterialens fysik
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- Odelius, Michael (author)
- Stockholms universitet,Fysikum,Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, S-10691 Stockholm, Sweden.
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- Butorin, Sergei (author)
- Uppsala universitet,Energimaterialens fysik
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(creator_code:org_t)
- 2022-07-04
- 2022
- English.
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In: Nature Communications. - : Nature Research. - 2041-1723. ; 13:1
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Abstract
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
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Man, Gabriel J.
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Kamal, Chinnatha ...
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Kalinko, Aleksan ...
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Phuyal, Dibya, 1 ...
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Acharya, Joydev
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Mukherjee, Soham
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Nayak, Pabitra K ...
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Rensmo, Håkan
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Odelius, Michael
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Butorin, Sergei
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Mechanical Engin ...
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and Energy Engineeri ...
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NATURAL SCIENCES
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and Chemical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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NATURAL SCIENCES
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Royal Institute of Technology
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Stockholm University
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Uppsala University