Water-processable electron-collecting layers of a hybrid poly(ethylene oxide): Caesium carbonate composite for flexible inverted polymer solar cells
| Autor: | Jung Chul Shin, Chan Youn Cho, Byoungchoo Park |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Materials science Ethylene oxide Renewable Energy Sustainability and the Environment Oxide Polymer Polymer solar cell Caesium carbonate Cathode Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry Chemical engineering law Organic chemistry Work function Layer (electronics) |
| Zdroj: | Solar Energy Materials and Solar Cells. 108:1-8 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2012.09.006 |
| Popis: | We herein report on the improved performance of inverted polymer solar cells (PSCs) that consist of a bulk-heterojunction (BHJ) photovoltaic (PV) layer with a water-processable electron-collecting interlayer of a hybrid poly(ethylene oxide) (PEO) and caesium carbonate (Cs 2 CO 3 ) compound. For the BHJ PV layers of poly(3-hexylthiophene):phenyl C 61 -butyric acid methyl ester (P3HT:PCBM), we found that the introduction of a solution-processed hybrid PEO:Cs 2 CO 3 interlayer dramatically enhanced the performance of the cells, resulting in improved power conversion efficiencies (PCEs) of 3.8% for the inverted PSCs on glass substrates. These improvements may be attributed to a reduction in the work function of the ITO cathode together with the dual functions of electron-selective/hole-blocking effects of the PEO:Cs 2 CO 3 interlayer. Moreover, the influence of the introduction of the PEO:Cs 2 CO 3 interlayer on device performance was also examined even for flexible inverted PSCs on plastic substrates, and a high PCE of 2.8% was obtained for these inverted structures. The use of this approach in the design of electron-collecting interlayers in flexible inverted PSC structures could be of considerable benefit in the future development of all-solution- and roll-to-roll processed PSCs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect