Synthesis and photophysical properties of semiconductor molecules D1-A-D2-A-D1-type structure based on derivatives of quinoxaline and dithienosilole for organics solar cells |
| |
| Affiliation: | 1. A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova Str., 28, Moscow, 119991, Russia;2. LG Chem Research Park, Daejeon, 104-1, Moonji-dong, Yuseong-gu, 305738, South Korea;3. Nanotechnology and Advanced Materials Laboratory, Department of Chemical Engineering, University of Patras, Patras, 26500 GR, Greece;4. Molecular Engineering Laboratory, Department of Physics, University of Patras, Patras, 26500 GR, Greece;5. Department of Physics, The LNM Institute of Information Technology, Jamdoli, Jaipur, Rajasthan 302031, India;1. School of Physical Science and Technology, Southwest University, Chongqing 400715, People''s Republic of China;2. College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, People''s Republic of China;1. Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea;2. School of Chemical and Biological Engineering, College of Engineering, Seoul National University, Seoul 151-742, Republic of Korea;3. Department of Applied Chemistry, Hanyang University, Ansan 426-791, Republic of Korea;1. LPMMAT, Faculté des Sciences Ain Chock, HASSAN II University, Casablanca, Morocco;2. IPCMS, UMR 7504 CNRS-UDS, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France;3. ESITH, Higher School of Textile Industries and Clothing, Casablanca, Morocco;4. University of Strasbourg, ICube, UMR 7357 CNRS-UDS, 23 rue du Loess, BP 20CR, 67037 Strasbourg Cedex, France;5. Kochi University of Technology, 185 Miyanoguchi Tosayamada Kochi, 782-8502 Japan |
| |
| Abstract: | A novel small molecule with D1-A-D2-A-D1 structure denoted as DTS(QxHT2)2 based on quinoxaline acceptor and dithienosilone donor units was synthesized and its optical and electrochemical properties were investigated. The thin film of DTS(QxHT2)2 showed a broad absorption profile covering the solar spectrum from 350 nm to 780 nm with an optical bandgap of 1.63 eV. The energy levels estimated from the cyclic voltammetry indicate that this small molecule is suitable as donor along with PC71BM as acceptor for the fabrication solution processed bulk heterojunction solar cells for efficient exciton dissociation and high open circuit voltage. The organic solar cells based on optimized DTS(QxHT2)2:PC71BM active layers processed with chloroform and DIO/CF showed overall power conversion efficiency of 3.16% and 6.30%, respectively. The higher power conversion efficiency of the solar cell based on the DIO/CF processed active layer is attributed to enhanced short circuit photocurrent and fill factor may be related to better phase separation between donor and acceptor in the active layer and more balanced charge transport, induced by the solvent additive. The power conversion efficiency of the organic solar cell was further improved up to 7.81% based on active layer processed with solvent additive, using CuSCN as hole transport layer instead of PEDOT:PSS and mainly attributed to increased fill factor and open circuit voltage due the formation of better Ohmic contact between the active layer and the CuSCN layer. |
| |
| Keywords: | D1-A-D2-A-D1 based small molecule Bulk heterojunction solar cells Solvent additive Power conversion efficiency |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
