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.

引用

页数：8