Molecular electron-acceptors based on benzodithiophene for organic photovoltaics
摘要:
Two extended conjugated molecules potentially active as electron-acceptor materials for organic solar cells have been synthesized by grafting the electron-withdrawing dicyanovinyl (1) and p-cyano pyridyl (2) groups on the rigid and planar benzodithiophene (BDT) platform. UV Vis spectroscopy shows that both compounds absorb in the visible region of the solar spectrum. Cyclic voltammetry indicates that only compound 1 presents a LUMO level comparable to that of fullerene C-60. A preliminary evaluation of the potentialities of compound 1 as an electron-acceptor has been carried out on 'all-molecular' solution-processed bulk hetero-junction solar cells using a small triphenylamine-based system as the molecular donor. In spite of a high open-circuit voltage, the devices present a modest efficiency indicating that the light-harvesting properties and charge-mobility of the acceptor-molecules need further structural optimization. (C) 2015 Elsevier Ltd. All rights reserved.
Significant Enhancement of Polymer Solar Cell Performance via Side-Chain Engineering and Simple Solvent Treatment
作者:Yang Wang、Ying Liu、Shaojie Chen、Ruixiang Peng、Ziyi Ge
DOI:10.1021/cm401618h
日期:2013.8.13
Rational design and synthesis of polymeric semiconductors is critical to the development of polymersolarcells (PSCs). In this work, a new series of benzodithiophene–difuranylbenzooxadiazole-based donor–acceptor co-polymers—namely, PBDT-DFBO, PBDTT-DFBO, and PBDTF-DFBO, with various side groups—have been developed for bulk-heterojunction PSCs. These side-group substituents provide the opportunity
Three smallmolecules named DR3TBDTT, DR3TBDTT-HD, and DR3TBD2T with a benzo[1,2-b:4,5-b']dithiophene (BDT) unit as the central building block have been designed and synthesized for solution-processed bulk-heterojunction solarcells. Power conversion efficiencies (PCEs) of 8.12% (certified 7.61%) and 8.02% under AM 1.5G irradiation (100 mW cm(-2)) have been achieved for DR3TBDTT- and DR3TBDT2T-based
Stable organic dyes based on the benzo[1,2-b:4,5-b′]dithiophene donor for efficient dye-sensitized solar cells
作者:Yi-Fan Chen、Jun-Min Liu、Jian-Feng Huang、Li-Lin Tan、Yong Shen、Li-Min Xiao、Dai-Bin Kuang、Cheng-Yong Su
DOI:10.1039/c5ta00332f
日期:——
A stable sensitizer incorporating the benzo[1,2-b:4,5-b′]dithiophene donor was used in dye-sensitized solar cells, showing the highest efficiency reported for amine-free organic dyes.
Hydrophobic Hole-Transporting Materials Incorporating Multiple Thiophene Cores with Long Alkyl Chains for Efficient Perovskite Solar Cells
作者:Pei-Yang Su、Yi-Fan Chen、Jun-Min Liu、Li-Min Xiao、Dai-Bin Kuang、Marcel Mayor、Cheng-Yong Su
DOI:10.1016/j.electacta.2016.05.122
日期:2016.8
structure-property relationships of these HTMs for perovskitesolarcells have been systematically investigated. It is found that introducing hydrophobic alkyl chains into HTMs can retard interfacial charge recombination and, specifically, improve stability owing to the enhanced moisture resistance. Perovskitesolarcellsbased on SP-01 give an overall conversion efficiency of 12.37% without, and 13.91% with the
Two extended conjugated molecules potentially active as electron-acceptor materials for organic solar cells have been synthesized by grafting the electron-withdrawing dicyanovinyl (1) and p-cyano pyridyl (2) groups on the rigid and planar benzodithiophene (BDT) platform. UV Vis spectroscopy shows that both compounds absorb in the visible region of the solar spectrum. Cyclic voltammetry indicates that only compound 1 presents a LUMO level comparable to that of fullerene C-60. A preliminary evaluation of the potentialities of compound 1 as an electron-acceptor has been carried out on 'all-molecular' solution-processed bulk hetero-junction solar cells using a small triphenylamine-based system as the molecular donor. In spite of a high open-circuit voltage, the devices present a modest efficiency indicating that the light-harvesting properties and charge-mobility of the acceptor-molecules need further structural optimization. (C) 2015 Elsevier Ltd. All rights reserved.