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Jin, Hosub
Quantum Materials Design Lab
Research Interests
  • Spin-orbit coupling, electron-correlation, topological quantum phases

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Amorphous oxide alloys as interfacial layers with broadly tunable electronic structures for organic photovoltaic cells

Cited 3 times inthomson ciCited 2 times inthomson ci
Title
Amorphous oxide alloys as interfacial layers with broadly tunable electronic structures for organic photovoltaic cells
Author
Zhou, NanjiaKim, Myung-GilLoser, StephenSmith, JeremyYoshida, HiroyukiGuo, XugangSong, CharlesJin, HosubChen, ZhihuaYoon, Seok MinFreeman, Arthur J.Chang, Robert P.H.Facchetti, AntonioMarks, Tobin J.
Keywords
interface; amorphous oxide; photovoltaic; interfacial layers
Issue Date
2015-06
Publisher
NATL ACAD SCIENCES
Citation
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.112, no.26, pp.7897 - 7902
Abstract
In diverse classes of organic optoelectronic devices, controlling charge injection, extraction, and blocking across organic semiconductor-inorganic electrode interfaces is crucial for enhancing quantum efficiency and output voltage. To this end, the strategy of inserting engineered interfacial layers (IFLs) between electrical contacts and organic semiconductors has significantly advanced organic light-emitting diode and organic thin film transistor performance. For organic photovoltaic (OPV) devices, an electronically flexible IFL design strategy to incrementally tune energy level matching between the inorganic electrode system and the organic photoactive components without varying the surface chemistry would permit OPV cells to adapt to ever-changing generations of photoactive materials. Here we report the implementation of chemically/environmentally robust, low-temperature solution-processed amorphous transparent semiconducting oxide alloys, In-Ga-O and Ga-Zn-Sn-O, as IFLs for inverted OPVs. Continuous variation of the IFL compositions tunes the conduction band minima over a broad range, affording optimized OPV power conversion efficiencies for multiple classes of organic active layer materials and establishing clear correlations between IFL/photoactive layer energetics and device performance.
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DOI
10.1073/pnas.1508578112
ISSN
0027-8424
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PHY_Journal Papers
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