A series of conducting gel electrolytes for quasi-solid-state quantum dot-sensitized solar cells with boosted electron transfer processes

• 来源期刊: 能源化学
• 年，卷（期）: 2018,（2）
• 页码范围: 335-341
• 页数: 7页
• 语种: 英文

摘要

To pursue electron-generation stability with no sacrifice of photovoltaic performance has been a persistent objective for all kinds of solar cells.Here,we demonstrate the experimental realization of this objective by quasi-solid-state quantum dot-sensitized solar cells from a series of conducting gel electrolytes composed of polyacrylamide (PAAm) matrix and conductive polymers [polyaniline (PANi),polypyrrole (PPy) or polythiophene (PT)].The reduction of Sx2-occurred in both interface and three dimensional framework of conducting gel electrolyte as a result of the electrical conduction of PANi,PPy and PT toward refluxed electrons from external circuit to Pt electrode.The resulting solar cells can yield the solarto-electrical conversion efficiency of 2.33％,2.25％ and 1.80％ for PANi,PPy and PT based gel electrolytes,respectively.Those solar cells possessed much higher efficiency than that of 1.74％ based on pure PAAm gel electrolyte owing to the enhanced kinetics for Sx2 (→) S2 conversion.More importantly,the stability of quasi-solid-state solar cell is significantly advanced,arising from the localization of liquid electrolyte into the three dimensional framework and therefore reduced leakage and volatilization.