Issue 39, 2022

High-performance semitransparent organic solar cells enabled by pseudo-planar heterojunction structures combined with optical engineering

Abstract

Semitransparent organic solar cells (ST-OSCs) are emerging as a promising renewable energy technology for building integration. However, how to solve the trade-off between power-conversion efficiency (PCE) and average visible transmittance (AVT) is always the key point for the further development of ST-OSCs. Herein, a pseudo-planar heterojunction (PPHJ) active layer, by sequentially depositing a polymer donor layer (PM6) and a small-molecule acceptor layer (BTP-eC9), was employed to improve the device performance and AVT, resulting in PCEs of 18.5% for opaque devices and 13.3% for semitransparent OSCs with an AVT of 18.5%. Furthermore, by introducing an effective anti-reflective covering layer, the AVT of the ST-OSCs was further improved up to 27.8% with little minus effect on the PCE (13.1%), as well as an impressive light-utilization efficiency (LUE) of 3.64% and a color-rendering index (CRI) of 94.6. It is worth noting that the PCE of 13.1% is the highest value at an AVT of over 25%. Our strategy represents a unique approach for improving the AVT and PCE of ST-OSCs simultaneously, facilitating the commercial development of OSCs.

Graphical abstract: High-performance semitransparent organic solar cells enabled by pseudo-planar heterojunction structures combined with optical engineering

Supplementary files

Article information

Article type
Paper
Submitted
25 Jun 2022
Accepted
13 Aug 2022
First published
15 Aug 2022

J. Mater. Chem. C, 2022,10, 14597-14604

High-performance semitransparent organic solar cells enabled by pseudo-planar heterojunction structures combined with optical engineering

D. Yang, R. Zhang, Y. Shi, X. Guo and M. Zhang, J. Mater. Chem. C, 2022, 10, 14597 DOI: 10.1039/D2TC02689A

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