Numerical Simulation of S-Shaped Current–Voltage Curves Induced by Electron Traps in Inverted Organic Photovoltaics

Luo, Shanglin; Huo, Mingfang; Xue, Qin; Xie, Guohua

doi:10.3390/ijms23042039

Open AccessCommunication

Numerical Simulation of S-Shaped Current–Voltage Curves Induced by Electron Traps in Inverted Organic Photovoltaics

¹

Department of Physical Science and Technology, Central China Normal University, Wuhan 430079, China

²

Sauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronics Materials, Department of Chemistry, Wuhan University, Wuhan 430072, China

^*

Authors to whom correspondence should be addressed.

Int. J. Mol. Sci. 2022, 23(4), 2039; https://doi.org/10.3390/ijms23042039

Submission received: 29 December 2021 / Revised: 20 January 2022 / Accepted: 11 February 2022 / Published: 12 February 2022

(This article belongs to the Special Issue Advances in Nanostructured Photovoltaics)

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Abstract

Organic photovoltaics (OPVs) differ from their inorganic counterparts because of inevitable electronic disorders and structural heterogeneity. Charge carrier traps are inevitable in organic semiconductors. A common failure mechanism of OPVs is the development of an S-shaped current density–voltage characteristic (J-V curve). Herein, we focus on investigating the underlying physical mechanism of S-shaped deformation of J-V curve of the inverted organic photovoltaic devices with bulk-heterojunction, proven by experiments with the n-doped electron extraction layer and numerical simulations assuming electron traps (0.1 eV deeper) in the electron extraction layer. The numerical simulations are quite consistent with the experimental results. In addition, the open circuit voltage induced by S-kink is exemplified to be enhanced after removing the electron traps in the interlayer by introducing a dopant of cesium carbonate.

Keywords: organic photovoltaics; current–voltage; electron traps; numerical simulation

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MDPI and ACS Style

Luo, S.; Huo, M.; Xue, Q.; Xie, G. Numerical Simulation of S-Shaped Current–Voltage Curves Induced by Electron Traps in Inverted Organic Photovoltaics. Int. J. Mol. Sci. 2022, 23, 2039. https://doi.org/10.3390/ijms23042039

AMA Style

Luo S, Huo M, Xue Q, Xie G. Numerical Simulation of S-Shaped Current–Voltage Curves Induced by Electron Traps in Inverted Organic Photovoltaics. International Journal of Molecular Sciences. 2022; 23(4):2039. https://doi.org/10.3390/ijms23042039

Chicago/Turabian Style

Luo, Shanglin, Mingfang Huo, Qin Xue, and Guohua Xie. 2022. "Numerical Simulation of S-Shaped Current–Voltage Curves Induced by Electron Traps in Inverted Organic Photovoltaics" International Journal of Molecular Sciences 23, no. 4: 2039. https://doi.org/10.3390/ijms23042039

APA Style

Luo, S., Huo, M., Xue, Q., & Xie, G. (2022). Numerical Simulation of S-Shaped Current–Voltage Curves Induced by Electron Traps in Inverted Organic Photovoltaics. International Journal of Molecular Sciences, 23(4), 2039. https://doi.org/10.3390/ijms23042039

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Numerical Simulation of S-Shaped Current–Voltage Curves Induced by Electron Traps in Inverted Organic Photovoltaics

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