Efficient Semitransparent Organic Solar Cells with CRI over 90% Enabled by an Ultralow-Bandgap A-DA'D-A Small Molecule Acceptor

Xu X, Wei Q, Zhou Z, He H, Tian J, Yip HL, Fu Y, Lu X, Zhou Y, Li Y, Zou Y (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Advanced Functional Materials Wiley-VCH Verlag

DOI: 10.1002/adfm.202305017

Abstract

Semitransparent organic solar cells (ST-OSCs) can function as power-generating windows due to their ability to allow visible light go-through for human eyesight while absorbing low-energy photons in the near-infrared region for photocurrent generation. In this regard, effective ST-OSCs with high light utilization efficiency (LUE) and color rendering index (CRI) can be developed via a synergistic material and device engineering strategy. Herein, an A-DA'D-A acceptor BZO-4Cl is synthesized with an ultralow optical bandgap of 1.26 eV and bathochromically shifted absorption of roughly 60 nm with respect to Y6. Initially, the opaque devices using PTB7-Th as the donor show a high power conversion efficiency (PCE) of 14.12%, which can be listed as one of the highest efficiencies for the PTB7-Th-based OSCs so far. Then, through these efforts of optimizations in the bulk-heterojunction(BHJ) composition, top electrodes and anti-reflection layer, the cutting-edge ST-OSC demonstrates a high LUE of 4.02%, and a CRI of 90.67%, making it one of the best-performing ST-OSCs with both high LUE and CRI values. These results indicate that the ST-OSCs presented in this study have significant potential for use in applications that possess transparent visible light and energy-generation functions.

Authors with CRIS profile

Jingjing Tian Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Central South University CN China (CN) South China University of Technology (SCUT) / 华南理工大学 CN China (CN) The Chinese University of Hong Kong (CUHK) CN China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) City University of Hong Kong (CityU) CN China (CN)

How to cite

APA:

Xu, X., Wei, Q., Zhou, Z., He, H., Tian, J., Yip, H.L.,... Zou, Y. (2023). Efficient Semitransparent Organic Solar Cells with CRI over 90% Enabled by an Ultralow-Bandgap A-DA'D-A Small Molecule Acceptor. Advanced Functional Materials. https://dx.doi.org/10.1002/adfm.202305017

MLA:

Xu, Xiang, et al. "Efficient Semitransparent Organic Solar Cells with CRI over 90% Enabled by an Ultralow-Bandgap A-DA'D-A Small Molecule Acceptor." Advanced Functional Materials (2023).

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