TY - JOUR
T1 - Exploring the Charge Dynamics and Energy Loss in Ternary Organic Solar Cells with a Fill Factor Exceeding 80%
AU - Zeng, Yihan
AU - Li, Danqin
AU - Xiao, Zuo
AU - Wu, Hongbo
AU - Chen, Zeng
AU - Hao, Tianyu
AU - Xiong, Shaobing
AU - Ma, Zaifei
AU - Zhu, Haiming
AU - Ding, Liming
AU - Bao, Qinye
N1 - Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/8/19
Y1 - 2021/8/19
N2 - Ternary architecture is a promising strategy to enhance power conversion efficiencies (PCEs) of organic solar cells (OSCs). However, among all the photovoltaic parameters that govern the final PCEs, the fill factor (FF) for ternary OSCs is generally below 78%, limiting solar cells’ performance. Here, charge dynamics in the ternary cells PM6:DRTB-T-C4:Y6 with a FF of 80.88% and a PCE of 17.05% are thoroughly investigated by a series of transient characterization technologies, including transient absorption spectroscopy, transient photovoltage, and transient photocurrent measurements. The impressive FF results from effective exciton dissociation, enhanced charge transport and suppressed recombination in ternary cells. Moreover, the correlation between the measured FF and the charge recombination-extraction competition is quantitatively analyzed by using a circuit model. The ternary cells also show small energy loss (Eloss). The findings here provide insight into achieving high-FF and low-Eloss ternary OSCs.
AB - Ternary architecture is a promising strategy to enhance power conversion efficiencies (PCEs) of organic solar cells (OSCs). However, among all the photovoltaic parameters that govern the final PCEs, the fill factor (FF) for ternary OSCs is generally below 78%, limiting solar cells’ performance. Here, charge dynamics in the ternary cells PM6:DRTB-T-C4:Y6 with a FF of 80.88% and a PCE of 17.05% are thoroughly investigated by a series of transient characterization technologies, including transient absorption spectroscopy, transient photovoltage, and transient photocurrent measurements. The impressive FF results from effective exciton dissociation, enhanced charge transport and suppressed recombination in ternary cells. Moreover, the correlation between the measured FF and the charge recombination-extraction competition is quantitatively analyzed by using a circuit model. The ternary cells also show small energy loss (Eloss). The findings here provide insight into achieving high-FF and low-Eloss ternary OSCs.
KW - charge dynamics
KW - charge recombination
KW - energy loss
KW - fill factor
KW - ternary organic solar cells
UR - https://www.scopus.com/pages/publications/85112707863
U2 - 10.1002/aenm.202101338
DO - 10.1002/aenm.202101338
M3 - 文章
AN - SCOPUS:85112707863
SN - 1614-6832
VL - 11
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 31
M1 - 2101338
ER -
