We reveal that ambient water plays an essential role in surface hydroxylation, epitaxial QDs fusion, and trap behavior in QD photovoltaics. By manipulating the deposition techniques and film morphology, the side effect of ambient water on CQD solar cells can be effectively suppressed.
Here we report a new CdTe solar cell doping approach with great potential using a solution method via an ex-situ diffusion technique at low temperature (<230 ºC). The As doped CdSeTe solar cells with a decent efficiency of 18% and a breakthrough activation ratio of ~ 5.88% are obtained.
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