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Proceedings Paper

N-type molecular electrical doping in organic semiconductors: formation and dissociation efficiencies of charge transfer complex
Author(s): Jae-Min Kim; Seung-Jun Yoo; Chang-Ki Moon; Bomi Sim; Jae-Hyun Lee; Heeseon Lim; Jeong Won Kim; Jang-Joo Kim
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Paper Abstract

Electrical doping is an important method in organic electronics to enhance device efficiency by controlling Fermi level, increasing conductivity, and reducing injection barrier from electrode. To understand the charge generation process of dopant in doped organic semiconductors, it is important to analyze the charge transfer complex (CTC) formation and dissociation into free charge carrier. In this paper, we correlate charge generation efficiency with the CTC formation and dissociation efficiency of n-dopant in organic semiconductors (OSs). The CTC formation efficiency of Rb2CO3 linearly decreases from 82.8% to 47.0% as the doping concentration increases from 2.5 mol% to 20 mol%. The CTC formation efficiency and its linear decrease with doping concentration are analytically correlated with the concentration-dependent size and number of dopant agglomerates by introducing the degree of reduced CTC formation. Lastly, the behavior of dissociation efficiency is discussed based on the picture of the statistical semiconductor theory and the frontier orbital hybridization model.

Paper Details

Date Published: 23 September 2016
PDF: 10 pages
Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 99411M (23 September 2016); doi: 10.1117/12.2235732
Show Author Affiliations
Jae-Min Kim, Seoul National Univ. (Korea, Republic of)
Seung-Jun Yoo, Seoul National Univ. (Korea, Republic of)
Chang-Ki Moon, Seoul National Univ. (Korea, Republic of)
Bomi Sim, Seoul National Univ. (Korea, Republic of)
Jae-Hyun Lee, Hanbat National Univ. (Korea, Republic of)
Heeseon Lim, KAIST (Korea, Republic of)
Jeong Won Kim, Korea Research Institute of Standards and Science (Korea, Republic of)
Jang-Joo Kim, Seoul National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 9941:
Organic Light Emitting Materials and Devices XX
Franky So; Chihaya Adachi; Jang-Joo Kim, Editor(s)

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