TY - JOUR
T1 - Economical low-light photovoltaics by using the Pt-free dye-sensitized solar cell with graphene dot/PEDOT:PSS counter electrodes
AU - Lee, Chuan-Pei
AU - Lin, Chin-An
AU - Wei, Tzu-Chiao
AU - Tsai, Meng-Lin
AU - Meng, Ying
AU - Li, Chun-Ting
AU - Ho, Kuo-Chuan
AU - Wu, Chih-I
AU - Lau, Shu-Ping
AU - He, Jr-Hau
PY - 2015/11
Y1 - 2015/11
N2 - Graphene 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-/I3- 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 <13.5 mW cm-2 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.
AB - Graphene 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-/I3- 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 <13.5 mW cm-2 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.
KW - Conducting polymer
KW - Dye-sensitized solar cell
KW - Graphene quantum dots
KW - Low light
KW - Platinum-free counter electrode
UR - http://www.scopus.com/inward/record.url?scp=84945939411&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84945939411&origin=recordpage
U2 - 10.1016/j.nanoen.2015.10.008
DO - 10.1016/j.nanoen.2015.10.008
M3 - RGC 21 - Publication in refereed journal
SN - 2211-2855
VL - 18
SP - 109
EP - 117
JO - Nano Energy
JF - Nano Energy
ER -
