Impact of inkjet printed ZnO electron transport layer on the characteristics of polymer solar cells
| Autor: | Josep Ferré-Borrull, Edith Osorio, Salvador I. Garduno, Lluis F. Marsal, Magali Estrada, José G. Sánchez, Victor S. Balderrama, Aurelien Viterisi, Josep Pallarès |
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| Rok vydání: | 2018 |
| Předmět: |
Fabrication
Materials science business.industry General Chemical Engineering Energy conversion efficiency chemistry.chemical_element 02 engineering and technology General Chemistry Zinc 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Polymer solar cell 0104 chemical sciences Active layer chemistry Optoelectronics Charge carrier 0210 nano-technology business Electronic band structure Layer (electronics) |
| Zdroj: | RSC advances. 8(24) |
| ISSN: | 2046-2069 |
| Popis: | In this paper, we demonstrate that zinc oxide (ZnO) layers deposited by inkjet printing (IJP) can be successfully applied to the low-temperature fabrication of efficient inverted polymer solar cells (i-PSCs). The effects of ZnO layers deposited by IJP as electron transport layer (ETL) on the performance of i-PSCs based on PTB7-Th:PC70BM active layers are investigated. The morphology of the ZnO-IJP layers was analysed by AFM, and compared to that of ZnO layers deposited by different techniques. The study shows that the morphology of the ZnO underlayer has a dramatic effect on the band structure and non-geminate recombination kinetics of the active layer deposited on top of it. Charge carrier and transient photovoltage measurements show that non-geminate recombination is governed by deep trap states in devices made from ZnO-IJP while trapping is less significant for other types of ZnO. The power conversion efficiency of the devices made from ZnO-IJP is mostly limited by their slightly lower JSC, resulting from non-optimum photon conversion efficiency in the visible part of the solar spectrum. Despite these minor limitations their J–V characteristics compare very favourably with that of devices made from ZnO layer deposited using different techniques. |
| Databáze: | OpenAIRE |
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