Correlating optimal electrode buffer layer thickness with the surface roughness of the active layer in organic phototransistors

	Correlating optimal electrode buffer layer thickness with the surface roughness of the active layer in organic phototransistors
	Yao B.; Li Y. L.; Wen Z. W.; Zhou M. Q.; Lv W. L.; Luo X.; Peng Y. Q.; Li W. H.; Gong G.; Liu X. Y.
	2014
发表期刊	Synthetic Metals
ISSN	ISBN/0379-6779
期号	193 页码:35-40
摘要	Inserting a C60 buffer layer between Au source/drain electrodes and pentacene active layer has been proved to improve the performances of pentacene organic phototransistors (PENT-OPTs) in our previous study. Buffer layer certainly has an optimal thickness with which the modified device can achieve the best performance. Based on the surface morphology analysis of different thickness C60 buffer layer on pentacene film, we further optimized the thickness of C60 buffer layer for best performance of PENT-OPTs and investigated its physical origins. Studies on PENT-OPTs with different pentacene surface morphology realized by different substrate temperatures indicate that the optimal thickness of C60 buffer layer directly related to the surface roughness of pentacene active layer and it is found that the optimized buffer layer thickness increases with the roughness of pentacene layer. Besides, we found that the photogenerated current of OPTs increases with the increasing of gate electric bias and then gradually reach saturation. An approximate analytical expression for gate voltage dependence of the photogenerated current was derived and used to fit the experiment data. An important parameter, saturated photoresponsivity, was introduced for better comparing the performances of OPTs. (C) 2014 Elsevier B.V. All rights reserved.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/43817
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Yao B.,Li Y. L.,Wen Z. W.,et al. Correlating optimal electrode buffer layer thickness with the surface roughness of the active layer in organic phototransistors[J]. Synthetic Metals,2014(193):35-40.
APA	Yao B..,Li Y. L..,Wen Z. W..,Zhou M. Q..,Lv W. L..,...&Liu X. Y..(2014).Correlating optimal electrode buffer layer thickness with the surface roughness of the active layer in organic phototransistors.Synthetic Metals(193),35-40.
MLA	Yao B.,et al."Correlating optimal electrode buffer layer thickness with the surface roughness of the active layer in organic phototransistors".Synthetic Metals .193(2014):35-40.

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