Universität zu Köln

Lim, Dae-Hee, Kang, Minji ORCID: 0000-0001-6244-4625, Jang, Soo-Young, Hwang, Kyoungtae, Kim, In-Bok, Jung, Eunhwan ORCID: 0000-0002-9326-6486, Jo, Yong-Ryun, Kim, Yeon-Ju, Kim, Jihong, Choi, Heechae ORCID: 0000-0002-9390-6607, Kim, Tae-Wook, Mathur, Sanjay ORCID: 0000-0003-2765-2693, Kim, Bong-Joong ORCID: 0000-0002-5335-4342 and Kim, Dong-Yu (2020). Unsymmetrical Small Molecules for Broad-Band Photoresponse and Efficient Charge Transport in Organic Phototransistors. ACS Appl. Mater. Interfaces, 12 (22). S. 25066 - 25075. WASHINGTON: AMER CHEMICAL SOC. ISSN 1944-8252

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Abstract

Organic photosensitizers have been investigated as effective light-sensing elements that can promote strong absorption with high field-effect mobility in organic phototransistors (OPTs). In this study, a novel organic photosensitizer is synthesized to demonstrate broad-band photoresponse with enhanced electrical performance. An unsymmetrical small molecule of a solubilizing donor (D-sol)-acceptor (A)-dye donor (D-dye) type connected with a twisted conjugation system is designed for broad-band detection (ranging from 250 to 700 nm). This molecule has high solubility, thereby facilitating the formation of uniformly dispersed nanoparticles in an insulating polymer matrix, which is deposited on top of OPT semiconductors by a simple solution process. The broad-band photodetection shown by the organic photosensitizer is realized with improved mobility close to an order of magnitude and high on/off current ratio (similar to 10(5)) of the organic semiconductor. Furthermore, p-type charge transport behavior in the channel of the OPT is enhanced through the intrinsic electron-accepting ability of the organic photosensitizer caused by the unique molecular configuration. These structural properties of organic photosensitizers contribute to an improvement in broad-band photosensing systems with new optoelectronic properties and functionalities.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lim, Dae-Hee UNSPECIFIED UNSPECIFIED UNSPECIFIED Kang, Minji UNSPECIFIED orcid.org/0000-0001-6244-4625 UNSPECIFIED Jang, Soo-Young UNSPECIFIED UNSPECIFIED UNSPECIFIED Hwang, Kyoungtae UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, In-Bok UNSPECIFIED UNSPECIFIED UNSPECIFIED Jung, Eunhwan UNSPECIFIED orcid.org/0000-0002-9326-6486 UNSPECIFIED Jo, Yong-Ryun UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Yeon-Ju UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Jihong UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Heechae UNSPECIFIED orcid.org/0000-0002-9390-6607 UNSPECIFIED Kim, Tae-Wook UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED Kim, Bong-Joong UNSPECIFIED orcid.org/0000-0002-5335-4342 UNSPECIFIED Kim, Dong-Yu UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-330681
DOI:	10.1021/acsami.0c02229
Journal or Publication Title:	ACS Appl. Mater. Interfaces
Volume:	12
Number:	22
Page Range:	S. 25066 - 25075
Date:	2020
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1944-8252
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language POLYMER SEMICONDUCTORS; SOLAR-CELLS; N-TYPE; P-TYPE; DONOR; PERFORMANCE; PHOTODETECTORS; COPOLYMER Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/33068