| Lifetime improvement of organic-inorganic hybrid perovskite solar cells by encapsulation |
| Paper ID : 1236-UFGNSM-FULL |
| Authors: |
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nasibeh mansoor rezaei *1, Farzaneh Arabpour2, Maryam Alidaie3, Seyed Mojtaba Sadrameli1, Vahid Ahmadi4, Farhood Najafi5, Morteza Izadifard3, Mohammad Ebrahim Ghazi3 1Department of Chemical Engineering,Tarbiat Modares University, Tehran, Iran 2Faculty of Electrical and Computer engineering, Tarbiat Modares University, Tehran, Iran 3Department of Physics, Shahrood University of Technology, Shahrood, Iran 4Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran 5Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran |
| Abstract: |
| Organic-inorganic hybrid perovskite solar cells (PSCs) were first used as visible-light sensitizers for liquid-junction- sensitized solar cells in 2009. The power conversion efficiency (PCE) of the perovskite based devices reached up to 20% by introducing two structures based on the mesoporous network and the planar heterojunction .Up to know, a PSC with a PCE of 22.1% is reported as the record by NREL. Although the PCEs of perovskite solar cells are comparable to the commercial solar cells, their short lifetime has still remained as a big challenge. These devices showed a strong sensitivity to moisture, light and heat. In this work, a perovskite solar cells device with FTO (500nm)/c-TiO2 (500 nm) /meso-TiO2(300nm) /CH3NH3PbI3(300nm)/P3HT(30nm)/Au(100nm) structure were fabricated. To improve the lifetime, a UV curable polymer resin was deposited on the Au contact layer. Subsequently, the photovoltaic performance of the non-encapsulated device and encapsulated device were measured during air exposure for 60 days. Furthermore, the devices were analyzed by XRD, SEM, UV-Visible and impedance spectroscopy. The results showed that the encapsulated device kept its initial performance after 60 days while the non-encapsulated device lost its initial PCE during this time period. Thus, the device degradation was delayed by preventing water molecules diffusion into the device using encapsulation. |
| Keywords: |
| Perovskite solar cells, stability, Encapsulation |
| Status : Paper Accepted (Poster Presentation) |
