Title:
|
Influence of the density of states on the open-circuit voltage in small-molecule solar cells
|
Author:
|
Galindo Lorente, Sergi; Ahmadpour Sayyar, Mehrad; Guerling, Luis Guillermo; Marsal Vinade, Albert; Voz Sánchez, Cristóbal; Alcubilla González, Ramón; Puigdollers i González, Joaquim
|
Other authors:
|
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies |
Abstract:
|
Open-circuit voltages are strongly dependent on the density-of-states in solar cells based on disordered semiconductors. In this work, organic solar cells based on tetraphenyldibenzoperiflanthene and fullerene C-70 with a bilayer structure were fabricated to investigate the variation in the density-of-states with the substrate temperature during deposition of the donor. The maximum open circuit voltage was reached at a substrate temperature of 60 degrees C. Organic thin-film transistors were also fabricated to study their electrical properties, such as the mobility and the density-of-states. Finally, an organic solar cell with p-i-n structure was fabricated at the optimized substrate temperature, and a power conversion efficiency of almost 4% was obtained. (C) 2014 Elsevier B.V. All rights reserved. |
Subject(s):
|
-Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica::Cèl·lules solars -Àrees temàtiques de la UPC::Enginyeria electrònica -Solar cells -Density of states -Open circuit voltage -Organic solar cell -Small molecule -OTFT -THIN-FILM TRANSISTORS -CONVERSION EFFICIENCY -PENTACENE -MOBILITY -DONORS -Cèl·lules solars |
Rights:
|
|
Document type:
|
Article - Published version Article |
Share:
|
|