Synthesis and Preferred All-<i>syn</i>Conformation of<i>C</i><sub>3</sub>-Symmetrical<i>N</i>-(Hetero)arylmethyl Triindoles
作者:Eva M. García-Frutos、Berta Gómez-Lor、Ángeles Monge、Enrique Gutiérrez-Puebla、Ibon Alkorta、José Elguero
DOI:10.1002/chem.200800911
日期:2008.9.26
A new series of C(3)-symmetrical N-(hetero)arylmethyltriindoles has been synthesized in a straightforward procedure. The structure and conformation in the solid state have been determined for three derivatives (3, 4, and 6) by X-ray crystallographic analysis. In all three cases, the molecules adopt a tripodal conformation with all of the flexible arms directed towards the same side, thereby delimiting
New interfacial materials for rapid hole-extraction in organic photovoltaic cells
作者:Chandramouli Kulshreshtha、Gyeong Woo Kim、Raju Lampande、Dal Ho Huh、Miyoung Chae、Jang Hyuk Kwon
DOI:10.1039/c3ta00808h
日期:——
Two new hole-extraction materials, TPDI (5,10,15-triphenyl-5H-diindolo[3,2-a:3′,2′-c]carbazole) and TBDI (5,10,15-tribenzyl-5H-diindolo[3,2-a:3′,2′-c]carbazole), were synthesized and explored in planar heterojunction organic solar cells (OSCs). The synthesized materials have good transparency in the visible spectrum, high hole mobility, and compatible highest occupied molecular orbital (HOMO) values with the donor material, which make them excellent hole-extraction layers (HELs) for OSCs. The SubPc (subphthalocyanine chloride)/C60 and SubNc (subnaphthalocyanine chloride)/C60 OSCs with a TBDI HEL show impressive 35.9% and 29.1% improvements in power conversion efficiencies compared to reference devices. Their HOMO values were evaluated as 5.2–5.3 eV and hole mobilities were measured as 5.9–6.1 × 10−3 cm2 V−1 s−1 at 0.3 MV cm−1 by the space-charge limited current method.