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Cho C, Jang YW, Lee S, Vaynzof Y, Choi M, Noh JH, Leo K. Effects of photon recycling and scattering in high-performance perovskite solar cells. Sci Adv 2021; 7:eabj1363. [PMID: 34936442 PMCID: PMC8694589 DOI: 10.1126/sciadv.abj1363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Efficient external radiation is essential for solar cells to achieve high power conversion efficiency (PCE). The classical limit of 1/2n2 (n, refractive index) for electroluminescence quantum efficiency (ELQE) has recently been approached by perovskite solar cells (PSCs). Photon recycling (PR) and light scattering can provide an opportunity to surpass this limit. We investigate the role of PR and scattering in practical device operation using a radiative PSC with an ELQE (13.7% at 1 sun) that significantly surpasses the classical limit (7.4%). We experimentally analyze the contributions of PR and scattering to this strong radiation. A novel optical model reveals an increase of 39 mV in the voltage of our PSC. This analysis can provide design principles for future PSCs to approach the Shockley-Queisser efficiency limit.
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Affiliation(s)
- Changsoon Cho
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, Dresden, Germany
- Corresponding author. (C.C.); (J.H.N.); (K.L.)
| | - Yeoun-Woo Jang
- Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul, Republic of Korea
- Department of Mechanical Engineering, Seoul National University, Seoul, Republic of Korea
| | - Seungmin Lee
- School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea
| | - Yana Vaynzof
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, Dresden, Germany
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, Dresden, Germany
| | - Mansoo Choi
- Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul, Republic of Korea
- Department of Mechanical Engineering, Seoul National University, Seoul, Republic of Korea
| | - Jun Hong Noh
- School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea
- Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul, Republic of Korea
- Corresponding author. (C.C.); (J.H.N.); (K.L.)
| | - Karl Leo
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, Dresden, Germany
- Corresponding author. (C.C.); (J.H.N.); (K.L.)
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