2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 5: Composite, Ceramic, Quasi-crystals, Nanomaterials & Coatings
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 578 pages |
| ISBN: | 978-1-987820-07-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Solution Based Organic-Inorganic Semiconductor Hybrid Solar cells
Muhammad Ikram1;1GOVERNMENT COLLEGE UNIVERSITY LAHORE,PUNJAB PAKISTAN, Pakpattan, Pakistan;
Type of Paper: Regular
Id Paper: 268
Topic: 14
Abstract:
We studied the influence of mixing TiO2 (8-10nm) and zinc oxides ZnO (E,100 nm) nanoparticles in photoactive layer of poly (3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) solar cells. Different amounts of ZnO, TiO2 and PCBM were mixed for a constant amount of P3HT to form blend for deposition of active layer using xylene as solvent. The addition of metal oxides in photoactive layer enhanced the power conversion efficiency (PCE) of the ITO/PEDOT:PSS/P3HT:PCBM:ZnO:TiO2/ LiF/Al devices from 1.13 % to 2.22 %. The increase in PCE is attributed to decrease in series resistance (Rs) of the devices and increase in the open circuit voltage (Voc), short circuit current density (Jsc) and External Quantum Efficiency (EQE) of the devices, originating from the rearrangement of energy levels in the active layer. The mixing is also found to introduce a red shift in the absorption spectra of the devices and increased absorption in the visible region probably due to the modification of the band gap of the active layer, originated from the change in the ratios of active layer materials and/or the rearrangement of energy levels in the active layer. The metal oxide nanoparticles are found to agglomerate as their concentration increases in the active layer and completely agglomerate in the absence of PCBM.