Electronic structure of polythieno[3,4-b]-thiophene-co-benzodithiophene (PTB7) derivatives for organic solar cell applications

Author(s)

Roldao, Juan Carlos ^[1] ; Oliveira, Eliezer Fernando ^[1] ; Lavarda, Francisco Carlos ^{[1, 2]}

Affiliation

^[1] UNESP Univ Estadual Paulista, POSMAT Programa Posgrad Ciencia & Tecnol Mat, Bauru, SP - Brazil

^[2] UNESP Univ Estadual Paulista, DF FC, Ave Engn Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP - Brazil

• Document type: Journal article
• Source: ORGANIC ELECTRONICS; v. 33, p. 246-252, JUN 2016.
• Web of Science Citations: 14

Abstract

Among the new materials currently employed as electron donor element in active layers of organic solar cells (OSCs), PTB7 holds the best results. It has been extensively studied and now there is a search for new derivatives to improve its properties. In this work, a set of 24 polymers derived from polythieno{[}3,4-b]-thiophene-co-benzodithiophene (PTB7) was studied theoretically, using chemical modifications in the benzodithiophene (BDT) moiety of the PTB7 monomeric units. After evaluations of the electronic and optical properties, including the open circuit voltage and exciton dissociation and recombination conditions, the results indicate that employing chlorine as substituent yields the most promising material for application in active layers together with Phenyl-C-61-Butyric-Acid-Methyl-Ester (PCBM) as electron acceptor material. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 12/21983-0 - Electronic structure of organic materials for applications in solar cells' active layers
• Grantee: Eliezer Fernando de Oliveira
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/20410-1 - Electronic structure of organic materials for applications in the active layer of solar cells
• Grantee: Francisco Carlos Lavarda
• Support type: Regular Research Grants