Author:
Lee Jeong Hyuk,Lee Byeong Hyeon,Kang Jeonghun,Diware Mangesh,Jeon Kiseok,Jeong Chaehwan,Lee Sang Yeol,Kim Kee Hoon
Abstract
Transparent p-CuI/n-SiZnSnO (SZTO) heterojunction diodes are successfully fabricated by thermal evaporation of a (111) oriented p-CuI polycrystalline film on top of an amorphous n-SZTO film grown by the RF magnetron sputtering method. A nitrogen annealing process reduces ionized impurity scattering dominantly incurred by Cu vacancy and structural defects at the grain boundaries in the CuI film to result in improved diode performance; the current rectification ratio estimated at ±2 V is enhanced from ≈106 to ≈107. Various diode parameters, including ideality factor, reverse saturation current, offset current, series resistance, and parallel resistance, are estimated based on the Shockley diode equation. An energy band diagram exhibiting the type-II band alignment is proposed to explain the diode characteristics. The present p-CuI/n-SZTO diode can be a promising building block for constructing useful optoelectronic components such as a light-emitting diode and a UV photodetector.
Funder
National Research Foundation of Korea (NRF) grant funded by the Korea government, MSICT
Subject
General Materials Science,General Chemical Engineering
Cited by
8 articles.
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