The influence of three diphenylpyran isomer co-sensitizers with different sterical structures on N719-based dye sensitized solar cells

Abstract

This work applied three isomers with different spatial geometries as co-sensitizers to enhance N719-based dye sensitized solar cells.

Molecular Engineering Strategies of Spectral Matching and Structure Optimization for Efficient Metal-Free Organic Dyes in Dye-Sensitized Solar Cells: A Theoretical Study

“…For example, a new type of multifunctional composite photoanode was reported recently, and the DSSC devices based on it obtained an impressive PCE of 14.13% . Meanwhile, some new electrolytes such as a cobalt electrolyte and a copper electrolyte have become available, serving as ideal alternatives to the traditional iodine electrolyte. − Besides, due to the fact that dye sensitizers with the abilities of harvesting solar photons and generating electrons are the indispensable factor for acquiring high PCE in DSSCs, more hotspots of research are concentrated on the field of dye design. − However, no single dyes are immune to the problem of their narrow absorption spectra and, therefore, do not take full advantage of incident sunlight. − Currently, the research strategies based on the simultaneous utilization of several dyes with complementary absorption spectra such as cosensitization and tandem devices have become the most popular approaches to overcome this challenge and achieve panchromatic absorption in DSSCs, − wherein cosensitization is the most common solution to boost the absorption of DSSCs by mixing different dyes and applying them to the identical device. Currently, the highest PCE of DSSCs based on cosensitization has exceeded 15%, which is the system consisting of two metal-free organic dyes .…”