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Title: Tuning Hole Transport Layer Using Urea for High-Performance Perovskite Solar Cells

Abstract

Interface engineering is critical to the development of highly efficient perovskite solar cells. Here, urea treatment of hole transport layer (e.g., poly(3,4-ethylene dioxythiophene):polystyrene sulfonate (PEDOT:PSS)) is reported to effectively tune its morphology, conductivity, and work function for improving the efficiency and stability of inverted MAPbI3 perovskite solar cells (PSCs). This treatment has significantly increased MAPbI3 photovoltaic performance to 18.8% for the urea treated PEDOT:PSS PSCs from 14.4% for pristine PEDOT:PSS devices. The use of urea controls phase separation between PEDOT and PSS segments, leading to the formation of a unique fiber-shaped PEDOT:PSS film morphology with well-organized charge transport pathways for improved conductivity from 0.2 S cm-1 for pristine PEDOT:PSS to 12.75 S cm-1 for 5 wt% urea treated PEDOT:PSS. The urea-treatment also addresses a general challenge associated with the acidic nature of PEDOT:PSS, leading to a much improved ambient stability of PSCs. Additionally, the device hysteresis is significantly minimized by optimizing the urea content in the treatment.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [2]; ORCiD logo [4]
  1. South Dakota State Univ., Brookings, SD (United States); Damietta Univ., New Damietta (Egypt)
  2. South Dakota State Univ., Brookings, SD (United States)
  3. South Dakota State Univ., Brookings, SD (United States); Tianjin Univ. of Technology, Tianjin (People's Republic of China)
  4. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
OSTI Identifier:
1490995
Alternate Identifier(s):
OSTI ID: 1487300
Report Number(s):
NREL/JA-5900-72477
Journal ID: ISSN 1616-301X
Grant/Contract Number:  
AC36-08GO28308; FOA-0000990
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Functional Materials
Additional Journal Information:
Journal Name: Advanced Functional Materials; Journal ID: ISSN 1616-301X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; conductivity; hole transport material; perovskite solar cells; urea

Citation Formats

Elbohy, Hytham, Bahrami, Behzad, Mabrouk, Sally, Reza, Khan Mamun, Gurung, Ashim, Pathak, Rajesh, Liang, Mao, Qiao, Qiquan, and Zhu, Kai. Tuning Hole Transport Layer Using Urea for High-Performance Perovskite Solar Cells. United States: N. p., 2018. Web. doi:10.1002/adfm.201806740.
Elbohy, Hytham, Bahrami, Behzad, Mabrouk, Sally, Reza, Khan Mamun, Gurung, Ashim, Pathak, Rajesh, Liang, Mao, Qiao, Qiquan, & Zhu, Kai. Tuning Hole Transport Layer Using Urea for High-Performance Perovskite Solar Cells. United States. doi:10.1002/adfm.201806740.
Elbohy, Hytham, Bahrami, Behzad, Mabrouk, Sally, Reza, Khan Mamun, Gurung, Ashim, Pathak, Rajesh, Liang, Mao, Qiao, Qiquan, and Zhu, Kai. Tue . "Tuning Hole Transport Layer Using Urea for High-Performance Perovskite Solar Cells". United States. doi:10.1002/adfm.201806740. https://www.osti.gov/servlets/purl/1490995.
@article{osti_1490995,
title = {Tuning Hole Transport Layer Using Urea for High-Performance Perovskite Solar Cells},
author = {Elbohy, Hytham and Bahrami, Behzad and Mabrouk, Sally and Reza, Khan Mamun and Gurung, Ashim and Pathak, Rajesh and Liang, Mao and Qiao, Qiquan and Zhu, Kai},
abstractNote = {Interface engineering is critical to the development of highly efficient perovskite solar cells. Here, urea treatment of hole transport layer (e.g., poly(3,4-ethylene dioxythiophene):polystyrene sulfonate (PEDOT:PSS)) is reported to effectively tune its morphology, conductivity, and work function for improving the efficiency and stability of inverted MAPbI3 perovskite solar cells (PSCs). This treatment has significantly increased MAPbI3 photovoltaic performance to 18.8% for the urea treated PEDOT:PSS PSCs from 14.4% for pristine PEDOT:PSS devices. The use of urea controls phase separation between PEDOT and PSS segments, leading to the formation of a unique fiber-shaped PEDOT:PSS film morphology with well-organized charge transport pathways for improved conductivity from 0.2 S cm-1 for pristine PEDOT:PSS to 12.75 S cm-1 for 5 wt% urea treated PEDOT:PSS. The urea-treatment also addresses a general challenge associated with the acidic nature of PEDOT:PSS, leading to a much improved ambient stability of PSCs. Additionally, the device hysteresis is significantly minimized by optimizing the urea content in the treatment.},
doi = {10.1002/adfm.201806740},
journal = {Advanced Functional Materials},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {12}
}

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