Tao Jia

Guangdong Polytechnic Normal University

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i-10 index

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Fei Huang

South China University of Technology

Kai Zhang

South China University of Technology

Ruijie Ma

Hong Kong Polytechnic University

Jiaying Wu

Hong Kong University of Science and Technology

Yongmin Luo

Hong Kong University of Science and Technology

Dan Yang

Harbin Engineering University

Top Archie Dela Peña

Hong Kong University of Science and Technology

Shili Gai

Harbin Engineering University

Piaoping Yang

Harbin Engineering University

Fei He

Hainan Medical University

Cooperative Institutions

South China University of Technology

Chinese Academy of Sciences

Jilin University

State Key Laboratory of Luminescent Materials and Devices

Harbin Engineering University

University of Hong Kong

Harbin University

Hong Kong University of Science and Technology

Harbin Institute of Technology

Zhejiang University

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Thickness Insensitive Organic Solar Cells with High Figure‐of‐Merit‐X Enabled by Simultaneous D/A Interpenetration and Stratification

Advanced Energy Materials (2024)

Xiyun Xie Ruijie Ma Yongmin Luo Top Archie Dela Peña W.K. Fong

Abstract Low cost and printing friendly fabrication of organic solar cells (OSCs) require thick‐film devices with simply structured photoactive molecules. Thus, achieving high power conversion efficiency (PCE) for non‐fused ring acceptor‐based devices with high thickness is of great significance. Herein, by transforming traditional blend casting method to emerging sequential deposition (SD) method, D18:A4T‐16 active blend exhibits large efficiency improvement from 8.02% to 14.75% in 300 nm thick devices. Systematic morphological and photophysical characterizations showcase the effectiveness of SD processing in achieving sufficient donor/acceptor interpenetration and vertical stratification, which eliminates the dilemma of charge generation/transport in blend casting films. Meanwhile, D18 bottom layer is proven helpful in realizing fast evaporation of postdeposited poor solvent, resulting in naturally thickened active layer with well‐regulated crystallization. Furthermore, a new index to emphasize thick‐film devices based on nonfused ring acceptors, called figure‐of‐merit‐X (FoM‐X), has been defined. The SD processed D18:A4T‐16 devices herein, with 300 nm, 500 nm, and 800 nm thicknesses possess leading FoM‐X values.

Figure of Merit

Stratification (seeds)

10.1002/aenm.202401355

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Citations (4)

An intelligent nanoplatform for imaging-guided photodynamic/photothermal/chemo-therapy based on upconversion nanoparticles and CuS integrated black phosphorus

Chemical Engineering Journal (2019)

Mengshu Xu Guixin Yang Huiting Bi Jiating Xu Shuming Dong

Photon Upconversion

Black Phosphorus

Photothermal effect

10.1016/j.cej.2019.122822

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Citations (58)

Manipulating the Charge Carriers Through Functionally Bridged Components Advances Low‐Cost Organic Solar Cells with Green Solvent Processing

Advanced Energy Materials (2023)

Top Archie Dela Peña Ruijie Ma Yongmin Luo Zengshan Xing Qi Wei

Abstract Organic solar cell (OSC) development continues to demonstrate impressive device efficiency improvements. However, the materials synthetic simplicity essential to industrialization remains seriously lacking attention, imparting inferior performance records in low‐cost devices. Hence, low bandgap and completely non‐fused electron acceptors (CNFEAs) having simple molecular structures are investigated herein. In contrast to typically explored fused‐ring acceptors with smaller backbone conformational variations, minimizing the interface recombination sites through a greater extent of localized domains is identified as more critical in CNFEAs, leading to remarkable fill factors ( FF s) approaching 75%, among the highest currently realized for low‐cost systems. However, this comes with diminishing charge generation efficiency. The general ternary blend optimization strategy modifying the morphology of host components is limited in preserving such remarkably high FF s. To suppress the trade‐off while keeping notable FF s, a new perspective of constructing functionally bridged components based on optical, electronic, and thermodynamic properties is introduced here. Specifically, charge generation is unrestrained from the host acceptor localized domains through the introduction of a “bridge” component while also taking advantage of the configuration to channel polarons toward the efficient transport moieties of the host components. Accordingly, this work incubates understanding‐guided optimizations toward the advancement of more practical devices.

Charge carrier

Acceptor

10.1002/aenm.202303169

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Citations (12)

Nitrile‐Substituted QA Derivatives: New Acceptor Materials for Solution‐Processable Organic Bulk Heterojunction Solar Cells

Advanced Energy Materials (2011)

Tianlei Zhou Tao Jia Bonan Kang Fenghong Li Mats Fahlman

Abstract The development of non‐fullerene‐based electron acceptors (especially organic molecules with sufficient absorption property within the solar spectrum region) for bulk‐heterojunction (BHJ) organic solar cells (OSCs) is an important issue for the achievement of high photoconversion efficiency. In this contribution, a new class of organic acceptors di‐cyan substituted quinacridone derivatives (DCN‐ n CQA, n = 4, 6 and 8) for BHJ solar cells was designed and synthesized. DCN‐ n CQA molecules possess facile synthesis, solution processability, visible and near‐IR light absorption and relatively stable characteristics. The DCN‐8CQA molecule exhibited a proper LUMO energy level (–4.1 eV), small bandgap (1.8 eV) and moderate electron mobility (10 −4 cm 2 V −1 S −1 ), suggesting that this molecule is an ideal acceptor material for the classical donor material regio‐regular poly (3‐hexylthiophene) (P3HT). A photovoltaic device with a structure of [ITO/PEDOT:PSS/P3HT:DCN‐8CQA/LiF/Al] displayed a power conversion efficiency of 1.57% and a fill factor of 57% under 100 mW cm −2 AM 1.5G simulated solar illumination. The DCN‐ n CQA molecules showed remarkable absorption in the region from 650 to 700 nm, where P3HT has a weak absorption promoting overlap with the solar spectrum and potentially improving the performance of the solar cell.

Acceptor

HOMO/LUMO

Electron acceptor

Hybrid solar cell

10.1002/aenm.201100082

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Citations (138)

Mediating morphology evolution via the regulation of molecular interactions between volatile solid additives and electron acceptor to enable organic solar cells with 19.20% efficiency

Chemical Engineering Journal (2024)

Ruiying Lin Zhenyu Luo Yunfei Wang Jiaxin Wu Tao Jia

Electron acceptor

Acceptor