Experimental and theoretical investigation of dye sensitized solar cells integrated with crosslinked poly(vinylpyrrolidone) polymer electrolyte using initiated chemical vapor deposition

THIN SOLID FILMS

卷:635

Article; Proceedings Paper

Smolin, Yuriy Y.¹  Janakiraman, Sruthi¹  Soroush, Masoud¹  Lau, Kenneth K. S.¹ 

[1] Drexel Univ, Dept Chem & Biol Engn, 3141 Chestnut St, Philadelphia, PA 19104 USA

关键词: Initiated chemical vapor deposition;    Poly(vinylpyrrolidone);    Polymer electrolyte;    Dye sensitized solar cell;    First principles mathematical modeling;   

DOI  :  10.1016/j.tsf.2016.12.034

来源: Elsevier

【 摘 要 】

Initiated chemical vapor deposition is used to integrate crosslinked poly(vinylpyrrolidone) (PVP) as a polymer electrolyte into the mesoporous TiO2 photoanode of dye sensitized solar cells (DSSCs). By adjusting the fractional saturation ratio of ethylene glycol diacrylate (EGDA) crosslinker to vinylpyrrolidone (VP) monomer, the amount of crosslinker within the crosslinked polymer is controlled directly, and a minimum ratio of 0.2:1 (EGDA to VP) is found to form a robust insoluble crosslinked film. Fineman-Ross copolymer analysis indicates that both VP and EGDA prefer to polymerize with VP rather than with EGDA, likely due to reduced steric hindrance. DSSCs incorporating crosslinked PVP polymer electrolyte are found to have 51% higher power conversion efficiency (37% higher in open circuit voltage and 25% higher in fill factor) compared to DSSCs with liquid electrolytes. First-principles macroscopic mathematical modeling reveals that the polymer electrolyte shifts the conduction band of TiO2 (vs. normal hydrogen electrode) negatively, increases shunt resistance, and affects interfacial processes like back-electron surface recombination in the cell. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free