Photocurrent Characteristics of Ferrocene/Flavin/Viologen/TCNQ Heterojunction

Kyung Sang Cho, Jeong Woo Choi, Won Hong Lee, Nam Woong Song, Dongho Kim

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8 Citations (Scopus)


A molecular photodiode was fabricated with the hetero-Langmuir-Blodgett (LB) film consisting of an electron donor (D), sensitizer (S), relay (R) and acceptor (A). Ferrocene, flavin, viologen and TCNQ were used as D, S, R and A units, respectively. By aligning hetero-LB film of D/S/R/A units on ITO glass with an aluminum thin film, a molecular photodiode with the structure of Metal/Insulator/Metal (MIM) was constructed. Due to excitation by irradiation with a 460 nm monochromatic light source, the photoswitching function was observed. And action spectrum of MIM device was measured. To investigate the photoswitching time and charge transport rate, transient photocurrent of MIM device was measured. Result shows that efficient charge transport from D to A in the heterojunction was occurred due to the existence of R and less recombination.

Original languageEnglish
Pages (from-to)275-278
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 1999

Bibliographical note

Funding Information:
This work is supported by the Research Fund on Optical Technology (F-15, 1997) of Korean Ministry of Science and Technology, and supported by Creative Research Initiatives of the Korean Ministry of Science and Technology.

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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