Synthesis and Characterization of Reduced Graphene Oxide/Rhodamine 101 (rGO-Rh101) Nanocomposites and Their Heterojunction Performance in rGO-Rh101/p-Si Device Configuration

BATIR G. G., ARIK M., Caldiran Z., TÜRÜT A., AYDOĞAN Ş.

JOURNAL OF ELECTRONIC MATERIALS, cilt.47, sa.1, ss.329-336, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47 Sayı: 1
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s11664-017-5758-4
  • Dergi Adı: JOURNAL OF ELECTRONIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.329-336
  • Anahtar Kelimeler: Reduced graphene oxide, rhodamine 101, quenching, heterojunction, LITHIUM-ION BATTERIES, PHOTORESPONSE PROPERTIES, POLY(VINYL ALCOHOL), ELECTRON-TRANSPORT, SCHOTTKY BARRIERS, AQUEOUS-SOLUTION, OXIDE, HETEROSTRUCTURES, FLUORESCENCE, CONTACTS
  • Atatürk Üniversitesi Adresli: Evet

Özet

Reduced graphene oxide (rGO)-rhodamine 101 (Rh101) nanocomposites with different ratios of rGO have been synthesized in aqueous medium by ultrasonic homogenization. The fluorescence of Rh101 as measured using a laser dye with high fluorescence quantum yield was substantially quenched with increasing amount of rGO in the nanocomposite. Formation of rGO-Rh101 nanocomposites was confirmed by x-ray diffraction analysis, scanning electron microscopy, ultraviolet-visible (UV-Vis) spectroscopy, and fluorescence microscopy. Furthermore, rGO-Rh101 nanocomposite/p-Si heterojunctions were synthesized, all of which showed good rectifying behavior. The electrical characteristics of these devices were analyzed using current-voltage (I-V) measurements to determine the ideality factor and barrier height. The experimental results confirmed the presence of lateral inhomogeneity in the effective barrier height of the rGO-Rh101 nanocomposite/p-Si heterojunctions. In addition to I-V measurements, one device was analyzed in more detail using frequency-dependent capacitance-voltage measurements. All electrical measurements were carried out at room temperature and in the dark.