Cargando…

The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends

To investigate the fluorination influence on the photovoltaic performance of small molecular based organic solar cells (OSCs), six small molecules based on 2,1,3-benzothiadiazole (BT), and diketopyrrolopyrrole (DPP) as core and fluorinated phenyl (DFP) and triphenyl amine (TPA) as different terminal...

Descripción completa

Detalles Bibliográficos
Autores principales: Lu, Zhen, Liu, Wen, Li, Jingjing, Fang, Tao, Li, Wanning, Zhang, Jicheng, Feng, Feng, Li, Wenhua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5302554/
https://www.ncbi.nlm.nih.gov/pubmed/28335208
http://dx.doi.org/10.3390/nano6040080
_version_ 1782506567395966976
author Lu, Zhen
Liu, Wen
Li, Jingjing
Fang, Tao
Li, Wanning
Zhang, Jicheng
Feng, Feng
Li, Wenhua
author_facet Lu, Zhen
Liu, Wen
Li, Jingjing
Fang, Tao
Li, Wanning
Zhang, Jicheng
Feng, Feng
Li, Wenhua
author_sort Lu, Zhen
collection PubMed
description To investigate the fluorination influence on the photovoltaic performance of small molecular based organic solar cells (OSCs), six small molecules based on 2,1,3-benzothiadiazole (BT), and diketopyrrolopyrrole (DPP) as core and fluorinated phenyl (DFP) and triphenyl amine (TPA) as different terminal units (DFP-BT-DFP, DFP-BT-TPA, TPA-BT-TPA, DFP-DPP-DFP, DFP-DPP-TPA, and TPA-DPP-TPA) were synthesized. With one or two fluorinated phenyl as the end group(s), HOMO level of BT and DPP based small molecular donors were gradually decreased, inducing high open circuit voltage for fluorinated phenyl based OSCs. DFP-BT-TPA and DFP-DPP-TPA based blend films both displayed stronger nano-scale aggregation in comparison to TPA-BT-TPA and TPA-DPP-TPA, respectively, which would also lead to higher hole motilities in devices. Ultimately, improved power conversion efficiency (PCE) of 2.17% and 1.22% was acquired for DFP-BT-TPA and DFP-DPP-TPA based devices, respectively. These results demonstrated that the nano-scale aggregation size of small molecules in photovoltaic devices could be significantly enhanced by introducing a fluorine atom at the donor unit of small molecules, which will provide understanding about the relationship of chemical structure and nano-scale phase separation in OSCs.
format Online
Article
Text
id pubmed-5302554
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-53025542017-03-21 The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends Lu, Zhen Liu, Wen Li, Jingjing Fang, Tao Li, Wanning Zhang, Jicheng Feng, Feng Li, Wenhua Nanomaterials (Basel) Article To investigate the fluorination influence on the photovoltaic performance of small molecular based organic solar cells (OSCs), six small molecules based on 2,1,3-benzothiadiazole (BT), and diketopyrrolopyrrole (DPP) as core and fluorinated phenyl (DFP) and triphenyl amine (TPA) as different terminal units (DFP-BT-DFP, DFP-BT-TPA, TPA-BT-TPA, DFP-DPP-DFP, DFP-DPP-TPA, and TPA-DPP-TPA) were synthesized. With one or two fluorinated phenyl as the end group(s), HOMO level of BT and DPP based small molecular donors were gradually decreased, inducing high open circuit voltage for fluorinated phenyl based OSCs. DFP-BT-TPA and DFP-DPP-TPA based blend films both displayed stronger nano-scale aggregation in comparison to TPA-BT-TPA and TPA-DPP-TPA, respectively, which would also lead to higher hole motilities in devices. Ultimately, improved power conversion efficiency (PCE) of 2.17% and 1.22% was acquired for DFP-BT-TPA and DFP-DPP-TPA based devices, respectively. These results demonstrated that the nano-scale aggregation size of small molecules in photovoltaic devices could be significantly enhanced by introducing a fluorine atom at the donor unit of small molecules, which will provide understanding about the relationship of chemical structure and nano-scale phase separation in OSCs. MDPI 2016-04-22 /pmc/articles/PMC5302554/ /pubmed/28335208 http://dx.doi.org/10.3390/nano6040080 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lu, Zhen
Liu, Wen
Li, Jingjing
Fang, Tao
Li, Wanning
Zhang, Jicheng
Feng, Feng
Li, Wenhua
The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends
title The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends
title_full The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends
title_fullStr The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends
title_full_unstemmed The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends
title_short The Influence of Fluorination on Nano-Scale Phase Separation and Photovoltaic Performance of Small Molecular/PC(71)BM Blends
title_sort influence of fluorination on nano-scale phase separation and photovoltaic performance of small molecular/pc(71)bm blends
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5302554/
https://www.ncbi.nlm.nih.gov/pubmed/28335208
http://dx.doi.org/10.3390/nano6040080
work_keys_str_mv AT luzhen theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT liuwen theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT lijingjing theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT fangtao theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT liwanning theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT zhangjicheng theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT fengfeng theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT liwenhua theinfluenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT luzhen influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT liuwen influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT lijingjing influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT fangtao influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT liwanning influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT zhangjicheng influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT fengfeng influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends
AT liwenhua influenceoffluorinationonnanoscalephaseseparationandphotovoltaicperformanceofsmallmolecularpc71bmblends