Article
Chemistry, Multidisciplinary
Ke Ma, Harindi R. Atapattu, Qiuchen Zhao, Yao Gao, Blake P. Finkenauer, Kang Wang, Ke Chen, So Min Park, Aidan H. Coffey, Chenhui Zhu, Libai Huang, Kenneth R. Graham, Jianguo Mei, Letian Dou
Summary: A novel multifunctional semiconducting organic ammonium cationic interface modifier is reported to boost the efficiency and stability of perovskite solar cells, achieving an excellent power conversion efficiency of 22.06%. By improving energy level alignment and stabilizing the interface, ion migration and halide phase segregation are suppressed, leading to long-term operational stability.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yawen Li, Yuze Lin
Summary: Planar heterojunctions (PHJs) have shown potential for achieving less traps and better stability compared to bulk heterojunctions (BHJs) in organic solar cells (OSCs). By using solution-processed fused-ring electron acceptors, PHJ-OSCs demonstrated high electroluminescence efficiency and stability, which can be further extended to different acceptor systems for efficient and stable OSCs.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Yunfei Wang, Jianhua Liu, Mei Yu, Jinyan Zhong, Qisen Zhou, Junming Qiu, Xiaoliang Zhang
Summary: This study investigates the effects of SnO2 surface halogenation on the photovoltaic performance of PSCs. The passivation using tetrabutylammonium chloride (TBAC) was found to be an optimal solution for improving the SnO2/perovskite interfacial properties. The halide ions on the SnO2 surface can interact with Sn atoms to increase charge density for high-efficiency charge extraction.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Multidisciplinary Sciences
Zijian Huang, Yang Bai, Xudan Huang, Jiatong Li, Yuetong Wu, Yihua Chen, Kailin Li, Xiuxiu Niu, Nengxu Li, Guilin Liu, Yu Zhang, Huachao Zai, Qi Chen, Ting Lei, Lifen Wang, Huanping Zhou
Summary: This study demonstrates a new approach to modulate the reaction kinetics between AX and BX2 in perovskite solar cells by exploring anion-pi interaction. The resulting films show improved quality, phase purity, and redshifted absorption. The achieved solar cells exhibit high power conversion efficiency and long-term stability. This method expands the range of chemical interactions in perovskite precursors and highlights the importance of the AX component.
Article
Nanoscience & Nanotechnology
Lijian Zuo, Sae Byeok Jo, Yaokai Li, Yuhuan Meng, Ryan J. Stoddard, Yun Liu, Francis Lin, Xueliang Shi, Feng Liu, Hugh W. Hillhouse, David S. Ginger, Hongzheng Chen, Alex K-Y Jen
Summary: Research shows that the "dilution effect" mechanism in multi-component organic solar cells can enhance luminescence quantum efficiency and open-circuit voltage, achieving high energy conversion efficiency.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ziyun Huang, Ruimin Zhou, Min Lv, Hao Zhang, Chen Yang, Yanan Shi, Yi Tang, Jianqi Zhang, Kun Lu, Zhixiang Wei
Summary: This study introduces a new method to improve the performance of all-small-molecule organic solar systems through ternary strategies, incorporating a small amount of the IDIC acceptor into a ZR1-Cl : IDIC-4Cl based binary system. Results show that the good miscibility enabled by two structurally similar acceptors can enhance short circuit current, open circuit voltage, and fill factor, thereby increasing power conversion efficiency.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Zeng Chen, Chengliang He, Peng Ran, Xu Chen, Yao Zhang, Chi Zhang, Runchen Lai, Yang (Michael) Yang, Hongzheng Chen, Haiming Zhu
Summary: This study investigates the photoinduced charge generation process in nonfullerene acceptor (NFA) based organic solar cells (OSCs). The results show that there is dominant ultrafast and lossless Forster resonance energy transfer (FRET) from photoexcited polymer donors to Y6, followed by reverse hole transfer (HT). This two-step process facilitates spectral uniform photocurrent generation and lowers the non-radiative recombination energy loss.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Xin Zong, Yawen Yang, Sun Yin
Summary: In organic solar cells (OSCs), the nonradiative voltage loss (& UDelta;V nr) is identified as a critical factor for the lower open-circuit voltage. A five-state model is proposed to explore the energy structures of spin states and reduce & UDelta;V nr in this study. The findings show that the spin singlet state for LE should have a lower energy than the triplet state to minimize & UDelta;V nr.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yalu Zou, Hongbin Chen, Xingqi Bi, Xiaoyun Xu, Hebin Wang, Menglu Lin, Zaifei Ma, Mingtao Zhang, Chenxi Li, Xiangjian Wan, Guankui Long, Yao Zhaoyang, Yongsheng Chen
Summary: The peripheral halogenation in non-fullerene acceptors affects the molecular stackings and device performances in organic solar cells. The study demonstrates that chloro-substitutions lead to unique intermolecular packing modes and improved device performance. Furthermore, the slight modification of peripheral halogens can boost the power conversion efficiencies of high-performance organic solar cells through delicate molecular stacking control.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Philipp Marlow, Felix Manger, Karen Fischer, Christian Sprau, Alexander Colsmann
Summary: This research elucidates the mechanism behind the formation of stable P3HT dispersions, revealing that electrostatic effects play a dominant role in nanoparticle growth and dispersion stability. The study also shows that additional charges can be generated by light to enhance the electrostatic dispersion stability. This research provides a new approach for the fabrication of organic solar cells and optoelectronic thin-film devices.
Review
Polymer Science
Yangjun Yan, Yajie Zhang, Waqar Ali Memon, Mengni Wang, Xinghua Zhang, Zhixiang Wei
Summary: This review provides an overview of the current understanding of entropy-driven charge separation in organic solar cells, focusing on the investigation of the entropy effect on exciton dissociation mechanism from both theoretical and experimental aspects. It explores factors such as the dimensionality of the organic semiconductor, energy disorder effect, morphology of the active layer, and the nonequilibrium effect, and discusses how they contribute to compensating the Coulomb dissociation barrier for charge transfer exciton separation and charge generation process. This review offers insights into the underlying mechanisms of exciton separation and provides pathways for enhancing the efficiency of organic solar cells.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Review
Chemistry, Physical
Shafket Rasool, Jiwoo Yeop, Na Gyeong An, Jae Won Kim, Jin Young Kim
Summary: Significant research has been conducted to understand the photo-physics of organic solar cells (OSCs) in order to improve their efficiency and stability. The invention of non-fullerene acceptors has revolutionized the understanding of OSCs, but there is a scarcity of research on air-processed OSCs. This review focuses on comparing the charge carrier dynamics of glovebox (GB) processed OSCs with air-processed (AP) OSCs and presents key requirements for efficient AP-OSCs.
Article
Energy & Fuels
Kazuki Kohzuki, Rei Shirouchi, Shin-ichiro Natsuda, Toshiharu Saito, Yuji Sakamoto, Yasunari Tamai
Summary: Suppressing charge recombination is crucial for enhancing the power conversion efficiency of organic solar cells (OSCs). The formation of both singlet and triplet charge transfer (CT) states in OSCs indicates that charge recombination via the triplet excited state is the main pathway for deactivation. However, it has been shown that charge separation from triplet excitons can occur in nonfullerene acceptor (NFA)-based OSCs, emphasizing the significance of minimizing the energy difference between singlet and triplet excited states of NFAs to suppress charge recombination.
Article
Chemistry, Physical
Naveen Harindu Hemasiri, Muhammad Ashraf, Samrana Kazim, Robert Graf, Nisar Ullah, Muhammad Nawaz Tahir, Shahzada Ahmad
Summary: Two-dimensional van der Waals layered materials exhibit strong Coulomb interactions, leading to large exciton binding energies. Tuning the interface is crucial for device functionality, including optoelectrical devices.
Article
Multidisciplinary Sciences
Xian'e Li, Qilun Zhang, Jianwei Yu, Ye Xu, Rui Zhang, Chuanfei Wang, Huotian Zhang, Simone Fabiano, Xianjie Liu, Jianhui Hou, Feng Gao, Mats Fahlman
Summary: Energy level alignment at donor-acceptor heterojunctions is crucial for charge generation and recombination in organic photovoltaic devices. This study systematically investigates the energy level alignment and its variation at different interfaces. Contrary to previous assumptions, significant vacuum level shifts are observed at the interfaces, resulting in reduced interfacial energetic offsets and increased charge transfer state energies.
NATURE COMMUNICATIONS
(2022)
