Fluorenyl hexa-peri-hexabenzocoronene-dendritic oligothiophene hybrid materials: synthesis, photophysical properties, self-association behaviour and device performance |
| |
Authors: | Wong Wallace W H Ma Chang-Qi Pisula Wojciech Mavrinskiy Alexey Feng Xinliang Seyler Helga Jones David J Müllen Klaus Bäuerle Peter Holmes Andrew B |
| |
Affiliation: | School of Chemistry, University of Melbourne, Bio21 Institute, 30 Flemington Road, Parkville, Victoria 3010, Australia. wwhwong@unimelb.edu.au |
| |
Abstract: | Apart from molecular properties, intermolecular forces play a vital role in defining the performance of organic electronic devices. This is particularly relevant in bulk heterojunction (BHJ) solar cells in which the arrangement of electron-donor and -acceptor materials into distinct crystalline phases of ideal size and distribution can lead to better power conversion efficiencies. In this study, a series of fluorenyl hexa-peri-hexabenzocoronenes (FHBC) decorated with thiophene dendrons (DOT) of variable size was obtained by using a convergent synthetic approach. With such variety of molecular sizes and shapes in hand, the objective of this study is to highlight the relationships between molecular properties, bulk properties and device performance. Correlations between π-π stacking ability and dendrimer generation were established from self-organisation studies in solution and solid state. The synergistic combination of molecular organisation at the nanoscale and photophysical characteristics derived from the FHBC and DOT moieties leads to a notable improvement of the photovoltaic performance. |
| |
Keywords: | aromatic hydrocarbons dendrimers organic solar cells self‐assembly thin films |
本文献已被 PubMed 等数据库收录! |
|