期刊
JAPANESE JOURNAL OF APPLIED PHYSICS
卷 60, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.35848/1347-4065/abdf7b
关键词
Organic semiconductor; Phthalocyanine; Charge carrier mobility; CELIV; Gaussian disorder
资金
- JSPS KAKENHI [20H04672 20H00391]
- JSPS Core-to-Core Program A., Advanced Research Networks
The study explores the carrier transport characteristics of 1,4,8,11,15,18,22,25-octaalkylphthalocyanine (CnPcH(2)) thin films, revealing a decrease in estimated hole mobility as the alkyl chain length increases. The impact of alkyl chain length on the energetic width of hopping site and distribution of hopping distance is discussed.
The carrier transport characteristics of 1,4,8,11,15,18,22,25-octaalkylphthalocyanine (CnPcH(2)) thin films have been investigated by utilizing metal-insulator-semiconductor charge extraction by the linearly increasing voltage method. As the alkyl chain length of CnPcH(2) increased from n = 5 to 8, the estimated hole mobility decreased by almost one and a half order of magnitude in the range of 10(-4) to 10(-5) cm(2) V-1 s(-1). Furthermore, the relationship between the alkyl chain length and site energy distribution in solution-processed phthalocyanine thin films was investigated. The temperature and field dependences of the hole mobility were analyzed using the Gaussian disorder model, and the effect of the alkyl chain length was discussed by taking the enlargement of the energetic width of the hopping site and the distribution of the hopping distance into consideration.
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