Controlling Light Absorption in Charge-Separating Core/Shell Semiconductor Nanocrystals
Data(s) |
2013
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Resumo |
Semiconductor nanocrystals of different formulations have been extensively studied for use in thin-film photovoltaics. Materials used in such devices need to satisfy the stringent requirement of having large absorption cross sections. Hence, type-II semiconductor nanocrystals that are generally considered to be poor light absorbers have largely been ignored. In this article, we show that type-II semiconductor nanocrystals can be tailored to match the light-absorption abilities of other types of nanostructures as well as bulk semiconductors. We synthesize type-II ZnTe/CdS core/shell nanocrystals. This material is found to exhibit a tunable band gap as well as absorption cross sections that are comparable to (die. This result has significant implications for thin-film photovoltaics, where the use of type-II nanocrystals instead of pure semiconductors can improve charge separation while also providing a much needed handle to regulate device composition. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/48302/1/Acs-Nan_7-12_11055_2013.pdf Mahadevu, Rekha and Yelameli, Aniruddha R and Panigrahy, Bharati and Pandey, Anshu (2013) Controlling Light Absorption in Charge-Separating Core/Shell Semiconductor Nanocrystals. In: ACS NANO, 7 (12). pp. 11055-11063. |
Publicador |
AMER CHEMICAL SOC |
Relação |
http://dx.doi.org/10.1021/nn404749n http://eprints.iisc.ernet.in/48302/ |
Palavras-Chave | #Solid State & Structural Chemistry Unit |
Tipo |
Journal Article PeerReviewed |