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Title: Hydroquinone-ZnO nano-laminate deposited by molecular-atomic layer deposition

In this study, we have deposited organic-inorganic hybrid semiconducting hydroquinone (HQ)/zinc oxide (ZnO) superlattices using molecular-atomic layer deposition, which enables accurate control of film thickness, excellent uniformity, and sharp interfaces at a low deposition temperature (150 °C). Self-limiting growth of organic layers is observed for the HQ precursor on ZnO surface. Nano-laminates were prepared by varying the number of HQ to ZnO cycles in order to investigate the physical and electrical effects of different HQ to ZnO ratios. It is indicated that the addition of HQ layer results in enhanced mobility and reduced carrier concentration. The highest Hall mobility of approximately 2.3 cm{sup 2}/V·s and the lowest n-type carrier concentration of approximately 1.0 × 10{sup 18}/cm{sup 3} were achieved with the organic-inorganic superlattice deposited with a ratio of 10 ZnO cycles to 1 HQ cycle. This study offers an approach to tune the electrical transport characteristics of ALD ZnO matrix thin films using an organic dopant. Moreover, with organic embedment, this nano-laminate material may be useful for flexible electronics.
Authors:
; ; ;  [1] ;  [1] ;  [2] ;  [3]
  1. Department of Material Science and Engineering, the University of Texas at Dallas, Richardson, Texas 75080 (United States)
  2. (Korea, Republic of)
  3. Department of Electrical Engineering, Myongji University, Yongin, Gyeonggi-do 449-728 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22398779
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; APPROXIMATIONS; CONCENTRATION RATIO; DEPOSITION; INTERFACES; LAYERS; MATRIX MATERIALS; PRECURSOR; QUINONES; SEMICONDUCTOR MATERIALS; SUPERLATTICES; SURFACES; THIN FILMS; ZINC OXIDES