LiTFSI/TBP-free hole transport materials with nonlinear π-conjugation for efficient inverted perovskite solar cells was written by Liu, Na;Zong, Xueping;Wang, Zhihui;Cui, Tianqiang;Liang, Mao;Zhang, Yue;Xue, Song. And the article was included in Electrochimica Acta in 2019.Formula: C8H6Br2O2 This article mentions the following:
We have synthesized two non-linear mols. with Y-shaped (XSln847) and X-shaped (XSln1453) structures via a facile synthetic route. Comparable to an X-shaped structure, the Y-shaped structural backbone of XSln847 enables a tight mol. stacking arrangement through multiple intermol. short contacts, which affords a nest-layer in mols. As a result, the pristine, Y-shaped XSln847 gives higher hole-mobility and more effective photoluminescence quenching than does XSln1453. Addnl., a decreased charge recombination occurs in the XSln847-fabricated inverted perovskite solar cells. As a consequence, the device based on XSln847 affords a higher power conversion efficiency of 15.02% than does that of XSln1453 (12.65%) under standard global AM 1.5 illumination. The efficiency is further improved to 17.16% when using XSln847 doping with 2, 3, 5, 6-tetrafluoro- 7, 7, 8, 8-tetracyanoquinodimethane, which is much higher than that of the widely-used PEDOT:PSS (11.95%) when measured under the same condition. These results demonstrate that the mol. engineering of hole transport materials with non-linear structure is a promising strategy for designing efficient mols. for inverted perovskite solar cells. In the experiment, the researchers used many compounds, for example, 3,5-Dibromo-4-methoxybenzaldehyde (cas: 108940-96-1Formula: C8H6Br2O2).
3,5-Dibromo-4-methoxybenzaldehyde (cas: 108940-96-1) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Formula: C8H6Br2O2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary