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Electron transport and energetic disorder in polymer:bisadduct fullerene photovoltaic blends

G. C. WANG1, L. G. WANG1,* , L. ZHANG1, Y. GUO1, B. B. CUI1


  1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, 454000, People’s Republic of China


In this paper, the electron transport and energetic disorder in photovoltaic blends of P3HT and a series of bisadduct analogues of PCBMs and their thienyl versions have been studied. It is shown that the current density versus voltage characteristics of electron-only devices of all P3HT:fullerene blends can be accurately described using our recently introduced improved mobility model. The occurrence of a multitude of different isomers results in a decrease in the electron transport for these blends, and the charge-carrier mobility is closely related to the energetic disorder. Furthermore, it is shown that the mobility in P3HT:fullerene blends is carrier concentration dependent, and the effective mobility in a P3HT:fullerene blend device with higher multitude of isomers fullerene phase is obviously lower than that in a P3HT:fullerene blend device with lower multitude of isomers fullerene phase. Both the maximum of carrier concentration and the minimum of electric field appear near the interface of P3HT:fullerene blend electron-only devices. These results suggest that the amount of energetic disorder appears to govern the charge carrier transport in polymer:fullerene blends..


Electron transport, Energetic disorder, Polymer:fullerene blends.

Submitted at: Aug. 31, 2020
Accepted at: Feb. 15, 2021


G. C. WANG, L. G. WANG, L. ZHANG, Y. GUO, B. B. CUI, Electron transport and energetic disorder in polymer:bisadduct fullerene photovoltaic blends, Journal of Optoelectronics and Advanced Materials Vol. 23, Iss. 1-2, pp. 29-34 (2021)