A Co-Sensitization Process for Dye-Sensitized Solar Cell: Enhanced Light-Harvesting Efficiency and Reduced Charge Recombination

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Luo, Junsheng^1 ; Wan, Zhongquan^1 ; Wang, Yan^1 ; Jia, Chunyang^1

State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu

610054, China^1

关键词: Charge recombinations;    Co-sensitization;    Fill factor;    Individual devices;    Light-harvesting;    Power conversion efficiencies;    Ruthenium complexes;    Short-circuit photocurrent densities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/4/042018/pdf
DOI  :  10.1088/1757-899X/394/4/042018

来源: IOP

【 摘 要 】

A ruthenium complex dye (N719) and a metal-free phenothiazine-based dye (PTZ-4) were used for the co-sensitized dye-sensitized solar cell (DSSC), intending to achieve complementary absorption spectra and reduce charge recombination, thereby improvement in the performance. Upon co-sensitization, the device made of the N719+PTZ-4 system yielded short-circuit photocurrent density (J sc) of 16.69mA cm-2, open circuit voltage (V oc) of 0.75V, fill factor (FF) of 0.67 and power conversion efficiency (PCE) of 8.42%; this performance is superior to that of either individual device made from dye N719 (PCE = 7.11%) or dye PTZ-4 (PCE = 5.14%). The improved performance ascribes to effectively enhance light-harvesting efficiency and reduce charge recombination by the co-sensitization process.