High Performance Inverted Organic Photovoltaics Without Hole Selective Contact
| Autor: | Savva, Achilleas, Burgués-Ceballos, Ignasi, Papazoglou, Giannis, Choulis, Stelios A., Kalli, Kyriacos |
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| Rok vydání: | 2016 |
| Předmět: |
Carrier-selective contacts
Materials science Organic solar cell FOS: Physical sciences Damp heat Inverted organic photovoltaics 7. Clean energy law.invention law hole-transport-layer-free OPVs hole selectivity Solar cell General Materials Science inverted organic photovoltaics photocurrent mapping Electrodes Condensed Matter - Materials Science business.industry Mechanical Engineering Energy conversion efficiency Materials Science (cond-mat.mtrl-sci) Hole-transport-layer-free OPVs bare silver electrodes electrodes Hole selectivity Bare silver electrodes Photocurrent mapping Electrode carrier-selective contacts Engineering and Technology Optoelectronics Selectivity business Layer (electronics) Research Article |
| Zdroj: | ACS Applied Materials & Interfaces |
| DOI: | 10.48550/arxiv.1610.10063 |
| Popis: | A detailed investigation of the functionality of inverted organic photovoltaics (OPVs) using bare Ag contacts as the top electrode is presented. The inverted OPVs without a hole-transporting layer (HTL) exhibit a significant gain in hole-carrier selectivity and power-conversion efficiency (PCE) after exposure in ambient conditions. Inverted OPVs comprised of ITO-ZnO-poly(3-hexylthiophene-2,5-diyl)/phenyl-C61-butyric acid methyl ester (P3HT/PCBM)-Ag demonstrate over 3.5% power conversion efficiency only if the devices are exposed in air for over 4 days. As concluded through a series of measurements, the oxygen presence is essential to obtaining fully operational solar cell devices without HTL. Moreover, accelerated stability tests under damp heat conditions (RH = 85% and T = 65 °C) performed to nonencapsulated OPVs demonstrate that HTL-free inverted OPVs exhibit comparable stability to the reference inverted OPVs. Importantly, it is shown that bare Ag top electrodes can be efficiently used in inverted OPVs using various high-performance polymer-fullerene bulk heterojunction material systems demonstrating 6.5% power-conversion efficiencies. |
| Databáze: | OpenAIRE |
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