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L. G. WANG1,* , L. Z. WANG1, Z. H. LIU1, Y. F. LI1, L. ZHANG1
Recently, significant advances have been made in the field of organic solar cells (OSCs) containing high-performance active layer materials, electrodes, as well as novel device structures. Particularly, the use of ternary active layers and the innovation of non-fullerene acceptor materials have contributed significantly to the power conversion efficiency (PCE) improvement in OSCs. In this paper, we investigate the effect of diffusion on charge transport in binary and ternary organic photovoltaic blends. It is shown that the temperature dependent current density-voltage characteristics from the drift-diffusion simulations incorporating the extended Gaussian disorder model (EGDM) are more consistent with experimental data in comparison with those obtained from the only drift model in binary PBDB-T:IEICO-4F and ternary PBDB-T:IEICO-4F:PC71BM blends. Furthermore, it is found that the effect of diffusion on charge transport is more pronounced at low voltages and seems to be negligible when the applied voltage exceeds 1 V. The deviation of calculated curves from experimental measurements gradually increases with increasing temperature. It is of great importance to the influence of diffusion effect on charge transport in binary and ternary organic photovoltaic blends.
Charge transport, Organic photovoltaics, Diffusion, Ternary active layers.
L. G. WANG, L. Z. WANG, Z. H. LIU, Y. F. LI, L. ZHANG, Effect of diffusion on charge transport in binary and ternary organic photovoltaic devices, Optoelectronics and Advanced Materials - Rapid Communications, 18, 1-2, January-February 2024, pp.32-38 (2024).
Submitted at: Aug. 22, 2023
Accepted at: Feb. 9, 2024
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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