Photovoltaic performance of bipyridine and dipyridophenazine ligands anchored ruthenium complex sensitizers for efficient dye-sensitized solar cells

被引：6
作者：
Chan, K. F. [1 ]
Lim, H. N. [1 ,2 ]
Ahmad, H. [1 ]
Gowthaman, N. S. K. [2 ]
机构：
[1] Univ Putra Malaysia, Fac Sci, Dept Chem, Upm Serdang 43400, Selangor, Malaysia
[2] Univ Putra Malaysia, Inst Adv Technol, Mat Synth & Characterizat Lab, Serdang 43400, Selangor, Malaysia
来源：
SOLID STATE SCIENCES | 2020年 / 107卷 / 107期
关键词：
Dye-sensitized solar cells; Ruthenium complex; Sensitizer; Bipyridine and dipyridophenazine ligands; NANOCRYSTALLINE TIO2; THIOCYANATE-FREE; RU(II) DYES; LIGHT; LAYER; FABRICATION; PHOTOANODE; CONVERSION; DESIGN;
D O I：
10.1016/j.solidstatesciences.2020.106368
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The performance of dye-sensitized solar cells (DSSCs) can be influenced by the sensitizer. Therefore, three hetemleptic ruthenium complexes, cis- [Ru(dcbpy)(bpy)(NCS)(2)] (Ru-bpy), cis-[Ru(dcbpy)(dppz)(NCS)(2)] (Ru- dppz) and cis-[Ru(dcbpy)(dppx)(NCS)(2)] (Ru-dppx) (dcbpy = 4,4'-dicarboxylic-2,2'-bipyridine, NCS = isothio- cyanate) sensitizers, were synthesized using one pot synthesis. The structures and functionalization of the ligands in each complex sensitizer were confirmed using FT-IR and NMR analyses. They were then systematically studied to determine their light absorption spectrum, the metal-centered oxidation peak, and electron recombination properties using a UV-vis spectrophotometer and electroanalytical techniques (i.e., CV, EIS, and LSV). The criteria for an efficient DSSC ruthenium sensitizer were drawn based on the structure-property relationship. It was found that the power conversion efficiency (q) of the sensitizers were in the sequence of Ru-dppz (q = 0.40%) < Ru-bpy (eta = 0.58%) < Ru-dppx (eta = 0.61%) in comparison to a commercialized sensitizer N719 (eta = 0.93%), The introduction of the dimethyl group altered the LUMO to enhance the electron injection to the TiO2 conduction band and thus increased the power conversion efficiency of the DSSC.
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