TY - JOUR
T1 - Dye-sensitized solar cells based on organic dyes with naphtho[2,1-b:3,4- b′]dithiophene as the conjugated linker
AU - Wang, Xiaoxu
AU - Guo, Lei
AU - Xia, Ping Fang
AU - Zheng, Fan
AU - Wong, Man Shing
AU - Zhu, Zhengtao
N1 - The work at the South Dakota School of Mines and Technology is supported by the National Science Foundation (Grant Number: EPS-0903804), the National Aeronautics and Space Administration (Cooperative Agreement Number: NNX13AD31A), the Research Corporation Cottrell College Science Award (Award Number. 10597), and the State of South Dakota. The work at Hong Kong Baptist University is supported
by the Institute of Molecular Functional Materials, a grant from the University Grants Committee, Areas of Excellence Scheme (AoE/P-03/08), and a grant from the Research Grants Council (HKBU 203212).
PY - 2013/11/14
Y1 - 2013/11/14
N2 - Naphtho[2,1-b:3,4-b′]dithiophene is used for the first time as the π-spacer for metal-free organic dyes in dye-sensitized solar cells (DSSCs). Four new donor-(π-spacer)-acceptor organic dyes using triarylamine or carbazole as the electron-donating group, cyanoacrylic acid as the electron-withdrawing anchoring moiety, and naphtho[2,1-b:3,4-b′] dithiophene as the linker were synthesized. The absorption, electrochemical, and photovoltaic properties of the dyes were investigated. DSSCs based on these dyes as sensitizers had efficiencies ranging from 3.98% to 4.60%. The highest efficiency was 4.60 ± 0.16% with a Jsc of 10.8 ± 0.4 mA cm-2, a Voc of 657 ± 5 mV, and a fill factor of 64.0 ± 0.2% under 100 mW AM 1.5 irradiation. The incident photon-to-current efficiency (IPCE) measurement showed that these dyes had high quantum efficiency over the visible range, and the long π-spacer of the molecule resulted in broader IPCE at long wavelength and high Jsc. Photovoltage transient was used to understand the electron recombination and the trends of the photovoltaic parameters (e.g. Voc and efficiency) of the DSSCs based on these organic dyes.
AB - Naphtho[2,1-b:3,4-b′]dithiophene is used for the first time as the π-spacer for metal-free organic dyes in dye-sensitized solar cells (DSSCs). Four new donor-(π-spacer)-acceptor organic dyes using triarylamine or carbazole as the electron-donating group, cyanoacrylic acid as the electron-withdrawing anchoring moiety, and naphtho[2,1-b:3,4-b′] dithiophene as the linker were synthesized. The absorption, electrochemical, and photovoltaic properties of the dyes were investigated. DSSCs based on these dyes as sensitizers had efficiencies ranging from 3.98% to 4.60%. The highest efficiency was 4.60 ± 0.16% with a Jsc of 10.8 ± 0.4 mA cm-2, a Voc of 657 ± 5 mV, and a fill factor of 64.0 ± 0.2% under 100 mW AM 1.5 irradiation. The incident photon-to-current efficiency (IPCE) measurement showed that these dyes had high quantum efficiency over the visible range, and the long π-spacer of the molecule resulted in broader IPCE at long wavelength and high Jsc. Photovoltage transient was used to understand the electron recombination and the trends of the photovoltaic parameters (e.g. Voc and efficiency) of the DSSCs based on these organic dyes.
UR - https://doi.org/10.1039/C4TA90160F
UR - http://www.scopus.com/inward/record.url?scp=84885905353&partnerID=8YFLogxK
U2 - 10.1039/c3ta12901b
DO - 10.1039/c3ta12901b
M3 - Journal article
AN - SCOPUS:84885905353
SN - 2050-7488
VL - 1
SP - 13328
EP - 13336
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 42
ER -
