Article
Chemistry, Physical
Christina Cheng, Stephen Wong, Garrett LeCroy, Sebastian Schneider, Enrique Gomez, Michael F. Toney, Alberto Salleo
Summary: The performance of nonfullerene-based organic solar cells is influenced by the morphology of the donor:acceptor blend, which is controlled by the composition. However, it is challenging to identify morphological design rules due to the complex relationship between composition-dependent phase behavior and device properties. In this study, the authors establish a direct link between PM6:Y6 film morphology and device properties by combining X-ray scattering and photocurrent spectroscopy. The results reveal that the charge transfer state at the amorphous-PM6:crystalline-Y6 interfaces controls the open-circuit voltage.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yiwen Ji, Xinyu Mu, Hang Yin, Bin Cui, Xiaotao Hao, Kun Gao
Summary: Organic solar cells (OSCs) based on nonfullerene acceptors (NFAs) have achieved rapid development, but the role of donor/acceptor (D/A) interfaces in NFA-based heterosystems has not been fully addressed. In this study, we found that the photoinduced spontaneous charge separation efficiency in typical NFA heterosystems can reach up to 67%, while the contribution of the D/A interface to charge separation efficiency is only 25%. The D/A interface plays a more important role in reducing the charge recombination rate and optimizing the competition between radiative and nonradiative charge recombination to minimize the nonradiative voltage loss.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Physical
Akchheta Karki, Alexander J. Gillett, Richard H. Friend, Thuc-Quyen Nguyen
Summary: The recent progress highlights how pairing new nonfullerene electron acceptors with suitable high-performing polymer electron donors has significantly improved the power conversion efficiencies of single-junction organic solar cells. Studies on the device photophysics of high performing polymer:NFA blends demonstrate the importance of morphology on efficiency, and further challenges need to be addressed in order to achieve PCEs of over 20% in NFA OSCs.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Tao Zhang, Cunbin An, Ye Xu, Pengqing Bi, Zhihao Chen, Jingwen Wang, Ni Yang, Yi Yang, Bowei Xu, Huifeng Yao, Xiaotao Hao, Shaoqing Zhang, Jianhui Hou
Summary: The correlation between molecular structure and photovoltaic performance is investigated using two medium-bandgap nonfullerene acceptors. The study finds that a large electrostatic potential difference is important for achieving high-performance OPV cells.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Yang Wang, Lu Zhou, Chao Zhang, Chao Zuo, Bin Du, Xiangchun Li, Wen-Yong Lai
Summary: This study reports a star-burst macromolecular acceptor based on an acceptor-pi-donor-pi-acceptor structure for nonfullerene organic solar cells. The introduction of noncovalent interactions in the peripheral groups enables better control of molecular distortion, leading to improved light absorption and conversion efficiency.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Suxiang Ma, Bangbang Li, Shaokuan Gong, Junwei Wang, Bin Liu, Sang Young Jeong, Xihan Chen, Han Young Woo, Kui Feng, Xugang Guo
Summary: Researchers synthesized a highly pure and reactive electron-deficient biselenophene imide monomer and copolymerized it with a dibrominated monomer to develop high-performance polymer acceptors for all-polymer solar cells. The resulting polymer showed improved molecular weight, narrower band gap, and higher electron mobility compared to the donor-acceptor type counterpart. The all-polymer solar cells based on the new polymer achieved a remarkable efficiency of 17.77%.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yihang Zhang, Guilong Cai, Yawen Li, Zhenzhen Zhang, Tengfei Li, Xia Zuo, Xinhui Lu, Yuze Lin
Summary: The introduction of BTPR as a third component in organic solar cells reduces the trap density, leading to significant improvements in PCE and energy loss. This offers new possibilities for achieving higher efficiency solar cells.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Applied
Xinyue Cui, Muhammad Bilal Ahmed Qureshi, Hao Lu, Hang Wang, Yahui Liu, Xiaodong Wang, Ya-Nan Chen, Miao Li, Zhe Zhang, Zhishan Bo
Summary: In this study, four PDI dimers with different structures were synthesized and used as acceptors for organic solar cells. Among them, FPDI-T with an X-shaped molecular conformation exhibited higher and more balanced charge transport properties, leading to a higher power conversion efficiency.
Review
Chemistry, Physical
Shreyam Chatterjee, Seihou Jinnai, Yutaka Ie
Summary: This review summarizes the critical evolution of various non-fullerene acceptors (NFAs) in combination with poly(3-hexylthiophene) (P3HT) in organic solar cells (OSCs) over the past decade, highlighting some important NFAs with new diversity and excellent performance. Additionally, it provides clear guidelines for further developing NFAs compatible with P3HT-based OSCs for future commercialization.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Yuanpeng Xie, Linglong Ye, Yunhao Cai, Xue Zhang, Jinqiu Xu, Tao Wang, Feng Liu, Yanming Sun
Summary: This study systematically investigated the aggregation behaviors of a new nonfullerene acceptor C10-IT4F through hot solution casting and thermal annealing, revealing that processing methods have a significant impact on the performance of OSCs. Excessive aggregation can decrease PCE, while enhancing J-aggregation can lead to higher PCE in OSCs.
Review
Chemistry, Physical
Yiwen Wang, Jinho Lee, Xueyan Hou, Chiara Labanti, Jun Yan, Eva Mazzolini, Amber Parhar, Jenny Nelson, Ji-Seon Kim, Zhe Li
Summary: While organic solar cells based on nonfullerene acceptors have achieved significant breakthroughs in their device performance, achieving long-term stability remains a major challenge for commercialization due to the lack of understanding of their degradation mechanisms and design rules for enhancing stability.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Feng Liu, Yuanyuan Jiang, Renjie Xu, Wenli Su, Shijie Wang, Yaogang Zhang, Kerui Liu, Shengjie Xu, Wenkai Zhang, Yuanping Yi, Wei Ma, Xiaozhang Zhu
Summary: By utilizing self-regulation effect, we have successfully controlled the aggregation behavior of nonfullerene acceptor Z9 in both crystal and thin film nanomorphology, achieving optimal nanomorphology with polymer donors and high power conversion efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Jianchuan Liu, Wenyu Zheng, Guangchao Han, Yuanping Yi
Summary: This study investigates the aggregation behavior of CO-bridge isomeric small-molecule acceptors in solutions and discovers the impact of large side-chain steric hindrance on molecular self-aggregation. Additionally, the synergistic effect of CO-bridge isomerization, side-chain branching, and end-group fluorination is found to control the pi-pi interactions, leading to the reversal of the aggregation ability of the isomeric small-molecule acceptors.
Article
Chemistry, Multidisciplinary
Lingyun Zhu, Jianqi Zhang, Yuan Guo, Chen Yang, Yuanping Yi, Zhixiang Wei
Summary: Y6 as an NFA, with its unique charge polarization effects, has a small exciton binding energy, resulting in a distinct mechanism for charge generation in photovoltaic devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Yuanyuan Zhou, Miao Li, Hao Lu, Hui Jin, Xiaodong Wang, Yan Zhang, Shuaishuai Shen, Zaifei Ma, Jinsheng Song, Zhishan Bo
Summary: A series of tetrathiophene-based fully non-fused ring acceptors have been developed for efficient organic solar cells, with the ability to tune solubility and packing through lateral chain size adjustments. Incorporating 2-ethylhexyl chains enhances compatibility with donor polymers and achieves high power conversion efficiencies.
ADVANCED FUNCTIONAL MATERIALS
(2021)
