Enhanced performance of ruthenium dye-sensitized solar cell by employing an organic co-adsorbent of N,N'-bis((pyridin-2-yl)(methyl)methylene)-o-phenylenediamine  

作　　者：Yang Xu Liang-Sheng Qiang Yu-Lin Yang Li-Guo Wei Ping Wang Rui-Qing Fan 

机构地区：[1]Department of Chemistry, Harbin Institute of Technology [2]College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology

出　　处：《Chinese Chemical Letters》2016年第1期127-134,共8页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos. 21171044 and 21371040);the National Key Basic Research Program of China (973 Program, No. 2013CB632900);the Fundamental Research Funds for the Central Universities (No. HIT. IBRSEM. A201409);Program for Innovation Research of Science in Harbin Institute of Technology (PIRS of HIT Nos. A201418, A201416 and B201414)

摘　　要：A pyridine-anchor co-adsorbent of N,N＇-bis（（pyridin-2-yl）（methyl） methylene）-o-phenylenediamine（named BPPI） is prepared and employed as co-adsorbent in dye-sensitized solar cells（DSSCs）. The prepared co-adsorbent could overcome the deficiency of N719 absorption in the low wavelength region of visible spectrum, offset competitive visible light absorption of I_3^-, enhance the spectral responses of the co-adsorbed TiO_2 film in region from 300 nm to 750 nm, suppress charge recombination, prolong electron lifetime, and decrease the total resistance of DSSCs. The optimized cell device co-sensitized by BPPI/N719 dye gives a short circuit current density of 12.98 m A cm^（-2）, an open circuit voltage of 0.73 V,and a fill factor of 0.66 corresponding to an overall conversion efficiency of 6.22% under standard global AM 1.5 solar irradiation, which is much higher than that of device solely sensitized by N719（5.29%）under the same conditions. Mechanistic investigations are carried out by various spectral and electrochemical characterizations.A pyridine-anchor co-adsorbent of N,N＇-bis（（pyridin-2-yl）（methyl） methylene）-o-phenylenediamine（named BPPI） is prepared and employed as co-adsorbent in dye-sensitized solar cells（DSSCs）. The prepared co-adsorbent could overcome the deficiency of N719 absorption in the low wavelength region of visible spectrum, offset competitive visible light absorption of I_3^-, enhance the spectral responses of the co-adsorbed TiO_2 film in region from 300 nm to 750 nm, suppress charge recombination, prolong electron lifetime, and decrease the total resistance of DSSCs. The optimized cell device co-sensitized by BPPI/N719 dye gives a short circuit current density of 12.98 m A cm^（-2）, an open circuit voltage of 0.73 V,and a fill factor of 0.66 corresponding to an overall conversion efficiency of 6.22% under standard global AM 1.5 solar irradiation, which is much higher than that of device solely sensitized by N719（5.29%）under the same conditions. Mechanistic investigations are carried out by various spectral and electrochemical characterizations.

关 键 词：Dye-sensitized solar cells Co-adsorbent Enhanced performance Co-sensitization 

分 类 号：TQ424[化学工程] TM914.4[电气工程—电力电子与电力传动]