Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 242, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2019.122449
Keywords
Copper indium gallium selenide; Microwave assisted synthesis; Spray deposition; Graphene oxide; Reduced graphene oxide; Dye-sensitized solar cell
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Funding
- CNPq in Brazil [458413/2014-3]
- PIBIC/CTI in Brazil
- PCl/CTI in Brazil
- National Research Foundation (NRF) in South Africa
- CANERGIE in South Africa
- Carsten trust fund in South Africa
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In this contribution, we explore a spray deposition technique to prepare thin films based on nanocomposites of graphene oxide (GO) or reduced graphene oxide (rGO) with CuInGaSe2 quantum dots (QD) synthesized by a microwave-assisted method. Small nanocrystals in the tetragonal phase and emitting light at 650 rim were obtained. Water-based solutions of the nanocomposites were sprayed onto transparent conductive glass substrates using an automated ultrasonic spray system and the resulting thin films were evaluated with respect to their morphological and electrochemical properties. The distribution and organization of the graphene sheets in the composites were affected by the interaction between the nanocrystals and GO or rGO, which also interfered on the electronic properties. In addition, we demonstrated a possible application of the thin film based on the rGOQD composite as a counter electrode in dye-sensitized solar cells.
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