A Highly Conductive Titanium Oxynitride Electron-Selective Contact for Efficient Photovoltaic Devices.
Hedhili, Mohamed N.
Anthopoulos, Thomas D.
De Wolf, Stefaan
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Material Science and Engineering
KAUST Solar Center (KSC)
Material Science and Engineering Program
KAUST Solar CenterKing Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
KAUST Grant NumberOSR-CRG URF/1/3383
Embargo End Date2021-07-03
Permanent link to this recordhttp://hdl.handle.net/10754/664004
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AbstractHigh-quality carrier-selective contacts with suitable electronic properties are a prerequisite for photovoltaic devices with high power conversion efficiency (PCE). In this work, an efficient electron-selective contact, titanium oxynitride (TiOx Ny ), is developed for crystalline silicon (c-Si) and organic photovoltaic devices. Atomic-layer-deposited TiOx Ny is demonstrated to be highly conductive with a proper work function (4.3 eV) and a wide bandgap (3.4 eV). Thin TiOx Ny films simultaneously provide a moderate surface passivation and enable a low contact resistivity on c-Si surfaces. By implementation of an optimal TiOx Ny -based contact, a state-of-the-art PCE of 22.3% is achieved for a c-Si solar cell featuring a full-area dopant-free electron-selective contact. Simultaneously, conductive TiOx Ny is proven to be an efficient electron-transport layer for organic photovoltaic (OPV) devices. A remarkably high PCE of 17.02% is achieved for an OPV device with an electron-transport TiOx Ny layer, which is superior to conventional ZnO-based devices with a PCE of 16.10%. Atomic-layer-deposited TiOx Ny ETL on a large area with a high uniformity may help accelerate the commercialization of emerging solar technologies.
CitationYang, X., Lin, Y., Liu, J., Liu, W., Bi, Q., Song, X., … De Wolf, S. (2020). A Highly Conductive Titanium Oxynitride Electron-Selective Contact for Efficient Photovoltaic Devices. Advanced Materials, 2002608. doi:10.1002/adma.202002608
SponsorsX.Y. and Y.L. contributed equally to this work. The work presented in this publication was supported by King Abdullah University of Science & Technology (KAUST), through the Competitive Research Grant no. OSR-CRG URF/1/3383. The authors also thank Heno Hwang, scientiﬁc illustrator at KAUST, for producing Figure2a.
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