Economical low-light photovoltaics by using the Pt-free dye-sensitized solar cell with graphene dot/PEDOT:PSS counter electrodes
AuthorsLee, Chuan Pei
Lin, Chin An
Wei, Tzu Chiao
Li, Chun Ting
Ho, Kuo Chuan
Wu, Chih I.
Lau, Shu Ping
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
KAUST Solar Center (KSC)
Online Publication Date2015-10-23
Print Publication Date2015-11
Permanent link to this recordhttp://hdl.handle.net/10754/622286
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AbstractGraphene dots (GDs) are used for enhancing the performance of the poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS)-based counter electrodes in Pt-free dye-sensitized solar cells (DSSCs). As compared to PEDOT:PSS CEs, GD-PEDOT:PSS films possess a rough surface morphology, high conductivity and electrocatalytic activity, and low charge-transfer resistance toward I/I redox reaction, pushing cell efficiency to 7.36%, which is 43% higher than that of the cell with PEDOT:PSS CEs (5.14%). Without much impact on efficiency, the DSSCs with GD-PEDOT:PSS CEs work well under low-light conditions (light intensity <13.5mWcm and angle of incidence >60°), such as indoor and low-level outdoor lighting and of the sun while the other traditional cells would fail to work. The concurrent advantage in low cost in Pt-free materials, simple fabrication processes, comparable efficiency with Pt CEs, and high performance under low-light conditions makes the DSSC with GD-PEDOT:PSS CEs suitable to harvest light for a diverse range of indoor and low-level outdoor lighting locations.
CitationLee C-P, Lin C-A, Wei T-C, Tsai M-L, Meng Y, et al. (2015) Economical low-light photovoltaics by using the Pt-free dye-sensitized solar cell with graphene dot/PEDOT:PSS counter electrodes. Nano Energy 18: 109–117. Available: http://dx.doi.org/10.1016/j.nanoen.2015.10.008.
SponsorsThis work was financially supported by KAUST baseline fund, the Research Grants Council of Hong Kong (Project no. PolyU 153012/14P), the National Natural Science Foundation of China (Grant no. 11374250), and National Taiwan University (102R4000).