Journal ArticleDOI
The design of dithieno[3,2-b:2′,3′-d]pyrrole organic photovoltaic materials for high-efficiency organic/perovskite solar cells
TLDR
In this article, the authors provide updates on progress related to the design and use of dithieno[3,2-b:2′,3′-d]pyrrole (DTP)-based OPMs as symmetric/asymmetric FREAs and dopant-free HTMs for obtaining record-high power conversion efficiencies and stable solar cells.Abstract:
Organic solar cells (OSCs) and perovskite solar cells (PVSCs) are emerging photovoltaic technologies with solution-processability and performance that can feasibly be tuned via the molecular design of key organic photovoltaic materials (OPMs). With the innovation of fused-ring electron acceptors (FREAs), the power conversion efficiency (PCE) values of OSCs have been pushed as high as 18%. Meanwhile, molecular hole-transport materials (HTMs) have demonstrated promising advantages compared to the widely used material spiro-OMeTAD, allowing PCEs of over 20% to be realized in dopant-free PVSCs. In this review, we provide updates on progress related to the design and use of dithieno[3,2-b:2′,3′-d]pyrrole (DTP)-based OPMs as symmetric/asymmetric FREAs and dopant-free HTMs for obtaining record-high power conversion efficiencies and stable solar cells since 2016, with the objective of giving insightful views into material design and device construction strategies to boost photovoltaic performance. Strategies relating to judicious molecular designs are demonstrated for fine-tuning the electronic structures, crystallinity, thermal properties, and molecular orientations of DTP-based OPMs. Structure–property correlations are discussed in detail. New device engineering and processing strategies tailored to DTP-OPM-based solar cells are emphasized. Finally, we briefly summarize original designs of DTP-derived OPMs to address the challenging issues facing emerging solar cells and highlight key considerations relating to the development of new efficient OPMs.read more
Citations
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Journal ArticleDOI
Asymmetric simple unfused acceptor enabling over 12% efficiency organic solar cells
TL;DR: In this paper, the authors conduct a systematic structure-property correlation study on three DTP-based unfused acceptors for organic solar cells (OSCs) and demonstrate strong near-infrared absorption with narrow optical band gap.
Journal ArticleDOI
An unfused-ring acceptor with high side-chain economy enabling 11.17% as-cast organic solar cells
TL;DR: In this paper, the authors proposed an electron-donating core for side-chain engineering on non-lerene acceptors (NFAs) for modulating their solubility and crystallinity as well as packing behaviors in active layers to pursue highperformance organic solar cells (OSCs).
Journal ArticleDOI
Chlorinated unfused acceptor enabling 13.57% efficiency and 73.39% fill factor organic solar cells via fine-tuning alkoxyl chains on benzene core
TL;DR: In this article, central side chains on 2-(4-(thiophen-2-yl)phenyl)-dithieno[3,2-b:2′,3′-d]pyrrole (DBT) asymmetric core were modulated to obtain high power conversion efficiency.
Journal ArticleDOI
Chlorinated unfused acceptor enabling 13.57% efficiency and 73.39% fill factor organic solar cells via fine-tuning alkoxyl chains on benzene core
TL;DR: In this article , central side chains on 2-(4-(thiophen-2-yl)phenyl)-dithieno[3,2-b:2′,3′-d]pyrrole (DBT) asymmetric core were modulated to produce three fluorinated noncovalently fused-ring electron acceptors.
Journal ArticleDOI
A Simple Dithieno[3,2-b:2',3'-d]pyrrol-Rhodanine Molecular Third Component Enables Over 16.7% Efficiency and Stable Organic Solar Cells.
Hongtao Wang,Linqiang Yang,Po-Chen Lin,Chu-Chen Chueh,Xin Liu,Shenya Qu,Shun Guang,Jiangsheng Yu,Weihua Tang +8 more
TL;DR: In this article, a simple dithieno[3,2-b:2',3'-d]pyrrole-rhodanine molecule (DR8) featuring high compatibility with polymer donor PM6 is developed as a cost effective third component.
References
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Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core
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Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies
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