journal article·2024-12Open access

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

Xiang Xu, Qingya Wei, Zhisheng Zhou, Haozhe He, Jingjing Tian, Hin‐Lap Yip, Yuang Fu, Xinhui Lu, Yonghua Zhou, Yongfang Li, Yingping Zou

Advanced Functional Materials· Volume 34· Issue 50

Abstract

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.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Powder Metallurgy College of Chemistry and Chemical Engineering Central South University Changsha 410083 P. R. China

State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices School of Materials Science and Engineering South China University of Technology 381 Wushan Road Guangzhou 510640 P. R. China

Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

Institute of Materials for Electronics and Energy Technology (i‐MEET) Department of Materials Science and Engineering Friedrich‐Alexander University Erlangen‐Nürnberg 91058 Erlangen Germany

Department of Materials Science and Engineering School of Energy and Environment Hong Kong Institute for Clean Energy City University of Hong Kong Hong Kong SAR 999077 P. R. China

Department of Physics The Chinese University of Hong Kong New Territories Hong Kong 999077 P.R.China

Funding

National Natural Science Foundation of China

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