| Full text | |
| Author(s): |
Silva Santos, Bianca Pedroso
[1, 2]
;
Lima, Allan Bastos
[3]
;
de Araujo, Francineide Lopes
[4]
;
Mota, Isabela Custodio
[1]
;
Ribeiro, Arthur de Castro
[2]
;
Nogueira, Ana Flavia
[4]
;
de Melo Furtado, Jose Geraldo
[2]
;
Garcia Filho, Fabio da Costa
[5]
;
Vieira Marques, Maria de Fatima
[1]
;
Monteiro, Sergio Neves
[5]
Total Authors: 10
|
| Affiliation: | [1] Fed Univ Rio de Janeiro UFRJ, Ctr Tecnol, Macromol Inst Prof Eloisa Mano IMA, Bloco J, Lab J-122, BR-21941598 Rio De Janeiro - Brazil
[2] Res Ctr Elect Energy Cepel, Av Horacio Macedo 354, BR-2194191 Rio De Janeiro - Brazil
[3] Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg - Germany
[4] State Univ Campinas UNICAMP, Lab Nanotechnol & Solar Energy LNES, Chem Inst, R Sergio Buarque Holanda S-N, BR-13083859 Campinas - Brazil
[5] Mil Inst Engn IME, Dept Mat Sci, Praca Gen TibUrcio 80, BR-22290270 Rio De Janeiro - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T; v. 10, p. 51-65, JAN-FEB 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
Novel conjugated random and block terpolymers composed of two electron-donating blocks - fluorene (Flo) and carbazole (Cz) - as well as one electron-accepting unit of thiophene-benzothiadiazole-thiophene (TBT) with the same (Flo:TBT:Cz) molar ratio of 0.5:1:0.5 were synthesized. The effects of their microstructure on physico-chemical properties and the performance of photovoltaic conversion were characterized. These conjugated terpolymers displayed two absorption peaks in UV-Vis analysis around 400 and 600 nm with a similar and narrow bandgap (1.9 eV, UV-Vis film), which is suitable to be applied as p-type semiconductors in an organic solar cell (OSC). Both synthesized terpolymers presented a high average molecular weight and degradation temperature above 400 degrees C. OSCs were assembled for determining the power conversion efficiency (PCE). Block terpolymer with a PCE of 1.3%, higher than that of 0.9% for the random terpolymer, was used as the electron donor in a conventional cell configuration. The device's optimization improved the photovoltaic parameters, mainly the short circuit current density, which allowed a PCE of 3.2% to be achieved. These results demonstrate that the synthesis of block terpolymers is a simple and practical approach for optimizing a conjugated polymer for an efficient OSC. (C) 2020 The Authors. Published by Elsevier B.V. (AU) | |
| FAPESP's process: | 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country |
| Grantee: | Ana Flávia Nogueira |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |