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

Tuning Hole Transport Layer Using Urea for High-Performance Perovskite Solar Cells [electronic resource]

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 fo...

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Bibliographic Details
Online Access: Full Text (via OSTI)
Corporate Author: National Renewable Energy Laboratory (U.S.) (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Washington, D.C. : Oak Ridge, Tenn. : United States. Department of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, 2018.
Subjects:
14 solar energy
36 materials science
Conductivity
Hole transport material
Perovskite solar cells
Urea
Solar energy
Materials science
Description
Summary: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 MAPbI<sub>3</sub> perovskite solar cells (PSCs). This treatment has significantly increased MAPbI<sub>3</sub> 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<sup>-1</sup> for pristine PEDOT:PSS to 12.75 S cm<sup>-1</sup> 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.
Item Description:Published through Scitech Connect.
12/18/2018.
"NREL/JA-5900-72477."
"Journal ID: ISSN 1616-301X."
Elbohy, Hytham ; Bahrami, Behzad ; Mabrouk, Sally ; Reza, Khan Mamun ; Gurung, Ashim ; Pathak, Rajesh ; Liang, Mao ; Qiao, Qiquan ; Zhu, Kai ;
Physical Description:Size: Article No. 1806740 : digital, PDF file.

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