Tandem structured spectrally selective coating layer of copper oxide nanowires combined with cobalt oxide nanoparticles
- Tandem structured spectrally selective coating layer of copper oxide nanowires combined with cobalt oxide nanoparticles
- 천동원; Tae Kyoung Kim; Bryan VanSaders; Jaeyun Moon; Taewoo Kim; Chin Hung Liu; Jirapon Khamwannah; Duyoung Choi; Alireza Kargar; Renkun Chen; Zhaowei Liu; Sungho Jin
- Tandemstructure; Spectrally selective coating (SSC) layer; Copper oxidenano-wires; Cobalt oxidenano-particles; Solar absorption; Solar thermal
- Issue Date
- Nano energy
- VOL 11-259
- Increasing the light absorption across the wide solar spectrum has important implications for applications in solar-thermal and photovoltaic energy conversion. Here, we report novel tandem structures combing two different materials with complementary optical properties and microstructures: copper oxide (CuO) nanowires (NWs) and cobalt oxide (Co3O4) nanoparticles (NPs). Copper oxide NWs of 100-200 nm in diameter and 5 pm long are grown thermally on copper foil in air and cobalt oxide NPs of 100-200 nm in diameter are synthesized hydrothermally. Tandem structures of spectrally selective coating (SSC) layer are built with three different methods: spray-coating, dip-coating of cobalt oxide NPs into copper oxide NWs forest, and transferring of copper oxide NWs layer onto cobalt oxide NPs layer. The tandem-structured SSC layers fabricated from the spray-coating, dip-coating and transferring methods exhibit figure of merit (FOM) values of 0.875, 0.892 and 0.886, respectively, which are significantly higher than that of the starting copper oxide NWs (FOM=0.858) and cobalt oxide NPs (FOM=0.853). Our results demonstrate the efficacy of using novel tandem structures for enhanced light absorption of solar spectrum, which will find broad applications in solar energy conversion.
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