Improved Photovoltaic Performance of Polymer Solar Cells via a Volatile and Nonhalogen Additive to Optimize Crystallinity was written by Liu, Xingpeng;Ren, Meiling;Niu, Xixi;Chen, Can;Du, Sanshan;Tong, Junfeng;Li, Jianfeng;Zhang, Rongling;Xia, Yangjun. And the article was included in ACS Applied Energy Materials in 2021.Related Products of 118-61-6 This article mentions the following:
Optimizing the photoactive layer morphol. in polymer solar cells (PSCs) using solvent additives is an effective and influential approach to improve photovoltaic performance. Traditional halogen-containing additives, such as 1,8-diiodooctane (DIO), 1-chloronaphthalene (CN), etc., limited further development due to toxicity, thereby the demand of volatile and halogen-free additives without sacrificing the device performance increases continuously. In this study, a nontoxic halogen-free additive, Et 2-hydroxybenzoate (EHB), was introduced and added to chlorobenzene (CB) solution to fabricate efficient PSCs. The device studies indicated that the additive incorporation could increase the efficiency of PTB7-Th:PC71BM devices from 5.27 to 9.64%. Photophys. studies showed that additives could promote charge extraction and inhibit charge recombination, which in turn improves power conversion efficiency (PCE). In addition, morphol. studies demonstrated better mol. ordering in active layers, which typically resulted in stronger crystallinity but reduced fullerene aggregation, thus pos. affecting layer deposition and improving carrier transport and donor-acceptor surface contact in the photoactive layer. This work proposes a strategy to design halogen-free additives to replace conventional additives in favor of PSC’s scalability in future. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Related Products of 118-61-6).
Ethyl 2-hydroxybenzoate (cas: 118-61-6) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Related Products of 118-61-6
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics