Tailored PEDOT:PSS hole transport layer for higher performance in perovskite solar cells: Enhancement of electrical and optical properties with improved morphology

Reza, Khan Mamun; Gurung, Ashim; Bahrami, Behzad; Mabrouk, Sally; Elbohy, Hytham; Pathak, Rajesh; Chen, Ke; Chowdhury, Ashraful Haider; Rahman, Md Tawabur; Letourneau, Steven; Yang, Hao-Cheng; Saianand, Gopalan; Elam, Jeffrey W.; Darling, Seth B.; Qiao, Qiquan

doi:10.1016/j.jechem.2019.09.014

Tailored PEDOT:PSS hole transport layer for higher performance in perovskite solar cells: Enhancement of electrical and optical properties with improved morphology

Journal Article · Fri May 01 00:00:00 EDT 2020 · Journal of Energy Chemistry

DOI:https://doi.org/10.1016/j.jechem.2019.09.014· OSTI ID:1600640

^[1]; ^[1]; Bahrami, Behzad ^[1]; Mabrouk, Sally ^[1]; ^[2]; Pathak, Rajesh ^[1]; ^[1]; Chowdhury, Ashraful Haider ^[1]; Rahman, Md Tawabur ^[1]; ^[3]; Yang, Hao-Cheng ^[3]; ^[4]; ^[3]; ^[5]; Qiao, Qiquan ^[1]

South Dakota State Univ., Brookings, SD (United States)
Damietta University (Egypt)
Argonne National Lab. (ANL), Argonne, IL (United States)
University of Newcastle, Callaghan, NSW (Australia)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)

Precise control over the charge carrier dynamics throughout the device can result in outstanding performance of perovskite solar cells (PSCs). Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is the most actively studied hole transport material in p-i-n structured PSCs. However, charge transport in the PEDOT:PSS is limited and inefficient because of its low conductivity with the presence of the weak ionic conductor PSS. In addition, morphology of the underlying PEDOT:PSS layer in PSCs plays a crucial role in determining the optoelectronic quality of the active perovskite absorber layer. This work is focused on realization of a non-wetting conductive surface of hole transport layer suitable for the growth of larger perovskite crystalline domains. This is accomplished by employing a facile solvent-engineered (ethylene glycol and methanol) approach resulting in removal of the predominant PSS in PEDOT:PSS. The consequence of acquiring larger perovskite crystalline domains was observed in the charge carrier dynamics studies, with the achievement of higher charge carrier lifetime, lower charge transport time and lower transfer impedance in the solvent-engineered PEDOT:PSS-based PSCs. Use of this solvent-engineered treatment for the fabrication of MAPbI3 PSCs greatly increased the device stability witnessing a power conversion efficiency of 18.18%, which corresponds to ~37% improvement compared to the untreated PEDOT:PSS based devices.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1600640

Journal Information:: Journal of Energy Chemistry, Journal Name: Journal of Energy Chemistry Vol. 44; ISSN 2095-4956

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Tailored PEDOT:PSS hole transport layer for higher performance in perovskite solar cells: Enhancement of electrical and optical properties with improved morphology

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