Jump to main content
Jump to site search


Non-toxic green food additive enables efficient polymer solar cells through adjusting the phase composition distribution and boosting charge transport

Author affiliations

Abstract

Solvent additives play an important role in optimizing the morphology of the photoactive layer and improving the photovoltaic performance of polymer solar cells (PSCs). However, the toxicity of common additives to the environment limits their further application in photovoltaic cells. Herein, a non-toxic green food additive, benzyl salicylate (BS), was introduced as a novel solvent additive into inverted PSCs based on ITO/ZnO/PTB7-Th:PC71BM/MoO3/Ag. Subsequently, the effect of BS on the photovoltaic performance was studied, and the best power conversion efficiency (PCE) of 9.43% was achieved when adding 2% BS into the photoactive layer of PSCs. Furthermore, the PSCs treated by 1–4% BS all exhibited good photovoltaic performance compared to that using 3% DIO (8.56%), which demonstrated that the universality was very strong. In addition, a good solubility for fullerenes was presented on BS like DIO, which was determined by atomic force microscopy and transmission electron microscopy. The water contact angle and time-off flight secondary ion mass spectroscopy results manifested that the good solubility of high-boiling-point additive BS to PC71BM could boost the phase composition distribution at the surface and in the vertical direction. Thus, an efficient route for exciton dissociation and charge transfer could be formed when the PSC was processed via 2% BS, which could also be ascertained by space charge limited current, impedance spectroscopy. The present research findings provide useful information for realizing large-area PSC fabrication, where a greener non-toxic additive is always preferred.

Graphical abstract: Non-toxic green food additive enables efficient polymer solar cells through adjusting the phase composition distribution and boosting charge transport

Back to tab navigation

Supplementary files

Article information


Submitted
01 Dec 2019
Accepted
03 Jan 2020
First published
06 Jan 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Non-toxic green food additive enables efficient polymer solar cells through adjusting the phase composition distribution and boosting charge transport

J. Li, Y. Wang, Z. Liang, J. Qin, M. Ren, J. Tong, C. Yang, C. Yang, X. Bao and Y. Xia, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC06571G

Social activity

Search articles by author

Spotlight

Advertisements