Effects of photon recycling and scattering in high-performance perovskite solar cells

Changsoon Cho; Yeoun Woo Jang; Seungmin Lee; Yana Vaynzof; Mansoo Choi; Jun Hong Noh; Karl Leo

doi:10.1126/sciadv.abj1363

Effects of photon recycling and scattering in high-performance perovskite solar cells

Changsoon Cho, Yeoun Woo Jang, Seungmin Lee, Yana Vaynzof, Mansoo Choi, Jun Hong Noh, Karl Leo

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

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.

Original language	English
Article number	eabj1363
Journal	Science Advances
Volume	7
Issue number	52
DOIs	https://doi.org/10.1126/sciadv.abj1363
Publication status	Published - 2021 Dec

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Copyright © 2021 The Authors, some rights reserved.

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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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AU - Cho, Changsoon

AU - Jang, Yeoun Woo

AU - Lee, Seungmin

AU - Vaynzof, Yana

AU - Choi, Mansoo

AU - Noh, Jun Hong

AU - Leo, Karl

PY - 2021/12

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Effects of photon recycling and scattering in high-performance perovskite solar cells

Abstract

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