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Enhanced efficiency of organic solar cells by using ZnO as an electron-transport layer

2017; IOP Publishing; Volume: 4; Issue: 12 Linguagem: Inglês

10.1088/2053-1591/aa9dc9

2053-1591

Irfan Ullah, Said Karim Shah, Sartaj Wali, Khizar Hayat, Shaukat Ali Khattak, Aurangzeb Khan,

Perovskite Materials and Applications

This paper reports the use of ZnO, processed by sol-gel, as an efficient electron-transport layer for inverted organic photovoltaic cells. The device with incorporated ZnO interlayer, annealed at 100 °C, between transparent electrode and blend film plays an effective role in enhancing photovoltaic properties: the short-circuit current density (Jsc) doubles while open-circuit voltage (Voc) and fill factor increase by 0.12 V and 10 %, respectively. Power conversion efficiency (PCE) of solar cell increases, approximately, three times. The improvement in the PCE is attributed to the presence of ZnO which, being an electron-facilitating layer, provides an energy step for charge collection at electrodes.