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Improving the Power‐Conversion Efficiency through Alloying in Common Anion CdZnX (X=S, Se) Nanocrystal Sensitized Solar Cells
Author(s) -
Maiti Sourav,
Anand Pranav,
Azlan Farazuddin,
Dana Jayanta,
Ghosh Hirendra N.
Publication year - 2019
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201900379
Subject(s) - nanocrystal , materials science , solar cell , photoluminescence , quantum dot , energy conversion efficiency , ternary operation , alloy , quantum yield , optoelectronics , femtosecond , ion , tandem , absorption (acoustics) , quantum efficiency , chemical engineering , nanotechnology , chemistry , metallurgy , optics , organic chemistry , composite material , laser , physics , engineering , computer science , fluorescence , programming language
In this paper, we have investigated the possibility of utilizing CdZnS and CdZnSe alloy nanocrystals (NCs) as sensitizers in quantum‐dot solar cells (QDSCs). The alloy NCs were synthesized by a high‐temperature hot injection method and subsequently characterized through high photoluminescence quantum yield, along with larger size compared to binary NCs. Femtosecond transient absorption measurements revealed long‐lived charge carriers in the alloy structure due to more structural rigidity and less defect states. Finally, the solar‐cell efficiencies of the CdZnS (CdZnSe) NCs were found to be 3.05 % (3.69 %) as compared to 1.23 % (3.12 %) efficiencies for CdS (CdSe) NCs. Thus, common anion ternary NCs have been successfully utilized for solar‐cell assembly and can be helpful for constructing tandem solar cells to harvest the high‐energy portion of solar radiation.