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2017 ; 7
(6
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Improving the Power Conversion Efficiency of Carbon Quantum Dot-Sensitized Solar
Cells by Growing the Dots on a TiO? Photoanode In Situ
#MMPMID28561765
Zhang Q
; Zhang G
; Sun X
; Yin K
; Li H
Nanomaterials (Basel)
2017[May]; 7
(6
): ä PMID28561765
show ga
Dye-sensitized solar cells (DSSCs) are highly promising since they can
potentially solve global energy issues. The development of new photosensitizers
is the key to fully realizing perspectives proposed to DSSCs. Being cheap and
nontoxic, carbon quantum dots (CQDs) have emerged as attractive candidates for
this purpose. However, current methodologies to build up CQD-sensitized solar
cells (CQDSCs) result in an imperfect apparatus with extremely low power
conversion efficiencies (PCEs). Herein, we present a simple strategy of growing
carbon quantum dots (CQDs) onto TiO? surfaces in situ. The CQDs/TiO? hybridized
photoanode was then used to construct solar cell with an improved PCE of 0.87%,
which is higher than all of the reported CQDSCs adopting the simple
post-adsorption method. This result indicates that an in situ growing strategy
has great advantages in terms of optimizing the performance of CQDSCs. In
addition, we have also found that the mechanisms dominating the performance of
CQDSCs are different from those behind the solar cells using inorganic
semiconductor quantum dots (ISQDs) as the photosensitizers, which re-confirms the
conclusion that the characteristics of CQDs differ from those of ISQDs.