Article
Chemistry, Physical
Bowen Sun, Nurlan Tokmoldin, Obaid Alqahtani, Acacia Patterson, Catherine S. P. De Castro, Drew B. Riley, Manasi Pranav, Ardalan Armin, Frederic Laquai, Brian A. Collins, Dieter Neher, Safa Shoaee
Summary: Research on the loss pathways and their impact on overall device performance in low-offset organic solar cell systems is crucial for improving efficiency.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Dan He, Miao Zeng, Zhenzhen Zhang, Yang Bai, Guichuan Xing, Hui-Ming Cheng, Yuze Lin
Summary: For the process of photovoltaic conversion in organic solar cells (OSCs) and quantum-dot solar cells (QDSCs), three of four steps are determined by exciton behavior. It is important to regulate exciton behavior in OSCs and QDSCs for achieving high power conversion efficiency. Recent progress has been made in managing exciton behavior to achieve prolonged exciton diffusion length and improved exciton dissociation.
Review
Chemistry, Multidisciplinary
Guangchao Han, Yuanping Yi
Summary: This paper summarizes the recent theoretical advances in the charge generation mechanisms of low-driving-force nonfullerene organic solar cells. Efficient exciton dissociation and charge separation are achieved through local pi-pi interaction and enhanced polarization energies. Furthermore, molecular packing structures and reduction of singlet-triplet energy difference contribute to improved charge generation efficiency and suppressed charge recombination.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Applied
Zhiyong Liu, Hongen Wang
Summary: In this study, a ternary polymer solar cell was fabricated using two well-compatible donors and one acceptor, achieving a higher power conversion efficiency. The use of two donors with similar HOMO energy levels and cascade LUMO energy levels is an efficient method to improve the performance of PSCs.
Article
Materials Science, Multidisciplinary
Sujung Park, Heunjeong Lee, Seok Won Park, Tae Eun Kim, Sung Heum Park, Yun Kyung Jung, Shinuk Cho
Summary: Through incorporating novel carbon quantum dots into the polyethyleneimine layer, this study successfully increased exciton dissociation efficiency and improved solar cell performance.
CURRENT APPLIED PHYSICS
(2021)
Article
Polymer Science
Jiaxiu Man, Zhiyong Liu
Summary: In this study, ternary polymer solar cells were fabricated using D18-Cl and D18 as blend donors and T6 as an acceptor. The optimized ternary PSCs with 35 wt% D18 achieved a power conversion efficiency of 16.66% and significantly improved short-circuit current density.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Tao Li, Bin Li, Haoxiang Zhou, Jun Wang, Gang Ni, Wanli Ma, Chuanxiang Sheng, Jianyu Yuan, Haibin Zhao
Summary: This study reports on the ultrafast dynamics of charge transfer and exciton dissociation in single-material organic solar cells for the first time. It is found that the intramolecular interface in the block copolymer has a higher transfer rate, and the dilute PBDB-T-b-PTY6 film has faster exciton dissociation. By optimizing ordering, the power conversion efficiency of organic solar cells can be improved.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Waldemar Kaiser, Veljko Jankovi, Nenad Vukmirovi, Alessio Gagliardi
Summary: This work presents a novel theoretical description of the nonequilibrium thermodynamics of charge separation in organic solar cells, quantifying for the first time the difference between nonequilibrium and equilibrium free energy profiles. The study reveals that charge separation in efficient OSCs proceeds via a cold but nonequilibrated pathway for delocalized electron-hole pairs at a small disorder, with large Gibbs entropy and initial electron-hole distance contributing to efficient charge separation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Zhiyong Liu, Hong-En Wang, Lin Xu
Summary: In this study, a polymer donor PTB7-Th with deep LUMO levels and good miscibility is introduced into ternary polymer solar cells, leading to improved short-circuit current and high power conversion efficiency.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Zhiyong Liu, Hong-En Wang
Summary: A ternary heterojunction strategy using PBDB-T-2F, IT-4F, and NC(70)BA as donor, acceptor, and third component, respectively, leads to improved photovoltaic performance in polymer solar cells. The introduction of NC(70)BA optimizes light absorption and exciton dissociation, resulting in a highest power conversion efficiency of 13.90% in an optimized ratio. This ternary strategy shows promise for developing highly efficient ternary PSCs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yuanyuan Zhou, Miao Li, Shuaishuai Shen, Jing Wang, Rui Zheng, Hao Lu, Yahui Liu, Zaifei Ma, Jinsheng Song, Zhishan Bo
Summary: The rapid development of fused-ring electron acceptors has made them a potential substitute to fullerene-based acceptors in organic solar cells, while nonfused-ring acceptors can significantly reduce synthetic cost and achieve reasonable power conversion efficiencies.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Han Zhang, Songrui Jia, Zhiyong Liu, Zheng Chen
Summary: In this study, ternary organic solar cells were prepared by incorporating PSEHTT into the PM6:L8-BO binary system. The results showed an improvement in PCE, as well as significant increases in JSC and VOC. Additionally, PSEHTT aided in fine-tuning photon collection and broadening the optical bandgap.
Article
Engineering, Biomedical
Debayan Dasgupta, Shanmukh Peddi, Deepak Kumar Saini, Ambarish Ghosh
Summary: By using magnetic nanobots to target and eliminate bacteria deep inside dentine, the failure of root canal treatments can be reduced, relieving the global burden of oral diseases.
ADVANCED HEALTHCARE MATERIALS
(2022)
Article
Chemistry, Physical
Jiu-Xun Sun, Hong-Chun Yang, Yang Li, Hai-Juan Cui
Summary: An analytical model for high-efficiency organic solar cells is proposed, taking into account various physical factors that have been ignored in previous models. The model is validated with experimental data and provides explanations for the sublinear relationship between current density and light intensity, as well as the effects of energetic disorder in bulk heterojunction organic solar cells.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Energy & Fuels
Chao Ma, Christopher C. S. Chan, Xinhui Zou, Han Yu, Jianquan Zhang, He Yan, Kam Sing Wong, Philip C. Y. Chow
Summary: Organic solar cells based on nonfullerene acceptor molecules exhibit high charge generation rates, with exciton dissociation at the D/A interface taking approximately 100 ps to complete. The charge transfer state separation into free electrons and holes at room temperature shows a similar timescale, but the free charge generation rate and yield are significantly reduced at low temperatures.
