Enhanced luminescence and photocurrent of organic microrod/ZnO nanoparticle hybrid system: Nanoscale optical and electrical characteristics

Guru P. Neupane, Krishna P. Dhakal, Eun Hei Cho, Bong Gi Kim, Seongchu Lim, Jubok Lee, Changwon Seo, Young Bum Kim, Min Su Kim, Jinsang Kim, Jinsoo Joo, Jeongyong Kim

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We studied the enhanced photoluminescence (PL) and photocurrent (PC) of 1,4-bis(3,5-bis(trifluoromethyl)styryl)-2,5-dibromobenzene (TSDB) microrods decorated with ZnO nanoparticles (NPs). Chemically synthesized crystalline ZnO NPs with an average size of 40 nm were functionalized with (3-aminopropyl)trimethoxysilane to result in the chemical bonding of the NPs onto the surface of the TSDB microrods. We observed a 2-fold PL enhancement in the ZnO/TSDB hybrid microrods compared with the PL of the pure TSDB microrods. In addition, PC measurement carried out on the TSDB and ZnO/TSDB hybrid microrods at two different excitation wavelengths of 355 nm and 405 nm showed the significant enhancement of the PC from the hybrid system, where the resonant excitation of the laser (355 nm) corresponding to the absorption of both ZnO and TSDB caused ∼3 times enhancement of the PC from the ZnO/TSDB hybrid microrods. [Figure not available: see fulltext.][Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)741-748
Number of pages8
JournalElectronic Materials Letters
Volume11
Issue number5
DOIs
Publication statusPublished - 2015 Sep 25

Keywords

  • TSDB
  • ZnO
  • energy transfer
  • photocurrent
  • photoluminescence

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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