The effects of MoO3 treatment on inverted PBDTTT-C:PC 71BM solar cells
Journal
Solar Energy Materials and Solar Cells
Journal Volume
119
Pages
235-240
Date Issued
2013
Author(s)
Ho, P.-Y.
Sun, J.-Y.
Kao, S.-H.
Kao, C.-Y.
Lin, S.-H.
Lan, S.
Tseng, W.-H.
Wu, C.-I.
Lin, C.-F.
Abstract
In recent years, organic solar cells have become the most potential technologies of the photovoltaic devices. In selection of the hole transport layer (HTL) in the inverted structure of organic solar cells, the use of molybdenum oxide (MoO3) has attracted more attention. However, the deposition of thermal evaporation in HTL fabrication requires highly vacuumed process, so it reduces the advantages in organic solar cells of large-area manufacture and low cost. Therefore, the solution process in MoO3 has been investigated. In this work, we dissolved MoO3 in isopropyl alcohol (IPA), spin-coated it on active layer Poly[(4,8-bis-(2-ethylhexyloxy)- benzo[1,2-b:4,5-b′]dithiophene)-2,6-diyl-alt-(4-(2-ethylhexanoyl) -thieno[3,4-b]thiophene))-2,6-diyl]): [6,6]-phenyl-C71-butyric acid methyl ester acid methyl ester (PBDTTT-C:PC71BM) as the anode modification layer in the inverted structure, and then modified further by air plasma before Ag(silver) electrodes were deposited. As a result, controlling the conditions of treating time, pressure and power of plasma, the efficiency of device with MoO3 solution process is improved from 2.50% to 4.65% under the plasma conditions 1.5Torr/18.0 W/1 min. © 2013 Elsevier B.V. All rights reserved.
Subjects
Air-plasma; Inverted structure; Organic solar cell; PBDTTT-C/PCBM; Solution process
SDGs
Other Subjects
Air-plasma; Inverted structure; Organic solar cell; PBDTTT-C/PCBM; Solution process; Esterification; Esters; Fabrication; Molybdenum oxide; Plasmas; Silver; Solar cells
Type
journal article