학술논문
Quantum barriers engineering toward radiative and stable perovskite photovoltaic devices.
Document Type
Academic Journal
Author
Yeom KM; School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea.; Cho C; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK.; Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea.; Institute for Convergence Research and Education in Advanced Technology, Yonsei University, Seoul, Republic of Korea.; Jung EH; Department of Energy Engineering, Korea Institute of Energy Technology (KENTECH), 21 KENTECH-gil, Naju, Republic of Korea.; Kim G; Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Republic of Korea.; Moon CS; School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea.; Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Republic of Korea.; Park SY; School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea.; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO, USA.; Kim SH; School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea.; Woo MY; School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea.; Khayyat MNT; School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea.; Lee W; Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea.; Jeon NJ; Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Republic of Korea.; Anaya M; Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK.; Stranks SD; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK.; Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK.; Friend RH; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK.; Greenham NC; Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK. ncg11@cam.ac.uk.; Noh JH; School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea. junhnoh@korea.ac.kr.; Department of Integrative Energy Engineering, Korea University, Seoul, Republic of Korea. junhnoh@korea.ac.kr.; Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul, Republic of Korea. junhnoh@korea.ac.kr.
Source
Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101528555 Publication Model: Electronic Cited Medium: Internet ISSN: 2041-1723 (Electronic) Linking ISSN: 20411723 NLM ISO Abbreviation: Nat Commun Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
Efficient photovoltaic devices must be efficient light emitters to reach the thermodynamic efficiency limit. Here, we present a promising prospect of perovskite photovoltaics as bright emitters by harnessing the significant benefits of photon recycling, which can be practically achieved by suppressing interfacial quenching. We have achieved radiative and stable perovskite photovoltaic devices by the design of a multiple quantum well structure with long (∼3 nm) organic spacers with oleylammonium molecules at perovskite top interfaces. Our L-site exchange process (L: barrier molecule cation) enables the formation of stable interfacial structures with moderate conductivity despite the thick barriers. Compared to popular short (∼1 nm) Ls, our approach results in enhanced radiation efficiency through the recursive process of photon recycling. This leads to the realization of radiative perovskite photovoltaics with both high photovoltaic efficiency (in-lab 26.0%, certified to 25.2%) and electroluminescence quantum efficiency (19.7 % at peak, 17.8% at 1-sun equivalent condition). Furthermore, the stable crystallinity of oleylammonium-based quantum wells enables our devices to maintain high efficiencies for over 1000 h of operation and >2 years of storage.
(© 2024. The Author(s).)
(© 2024. The Author(s).)