Origins of the open-circuit voltage in ternary organic solar cells and design rules for minimized voltage losses
Artikel i vetenskaplig tidskrift, 2023
The power conversion efficiency of ternary organic solar cells (TOSCs), consisting of one host binary blend and one guest component, remains limited by large voltage losses. The fundamental understanding of the open-circuit voltage (V OC) in TOSCs is controversial, limiting rational design of the guest component. In this study, we systematically investigate how the guest component affects the radiative and non-radiative related parts of V OC of a series of TOSCs using the detailed balanced principle. We highlight that the thermal population of charge-transfer and local exciton states provided by the guest binary blend (that is, the guest-component-based binary blend) has a significant influence on the non-radiative voltage losses. Ultimately, we provide two design rules for enhancing the V OC in TOSCs: high emission yield for the guest binary blend and similar charge-transfer-state energies for host/guest binary blends; high miscibility of the guest component with the low gap component in the host binary blend.
Författare
Yuming Wang
Linköpings universitet
Universiteit Hasselt
Jianwei Yu
Linköpings universitet
Rui Zhang
Linköpings universitet
Jun Yuan
Linköpings universitet
Central South University
Sandra Hultmark
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Catherine E. Johnson
Imperial College London
Nathaniel P. Gallop
Imperial College London
Bernhard Siegmund
Universiteit Hasselt
D. P. Qian
Linköpings universitet
Huotian Zhang
Linköpings universitet
Y. P. Zou
Central South University
M. Kemerink
Universität Heidelberg
Linköpings universitet
Artem A. Bakulin
Imperial College London
Christian Müller
Chalmers, Kemi och kemiteknik, Tillämpad kemi
K. Vandewal
Universiteit Hasselt
Xian Kai Chen
Soochow University
Feng Gao
Linköpings universitet
Nature Energy
20587546 (eISSN)
Vol. 8 9 978-988Nästa generation organiska solceller (OPV 2.0)
Vetenskapsrådet (VR) (2016-06146), 2017-01-01 -- 2022-12-31.
Vetenskapsrådet (VR) (2016-06146), 2017-01-01 -- 2022-12-31.
Vetenskapsrådet (VR) (2016-06146), 2017-01-01 -- 2022-12-31.
Ämneskategorier
Energiteknik
Annan elektroteknik och elektronik
DOI
10.1038/s41560-023-01309-5