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May 24 – 25, 2021
Faculty of Science, Prince of Songkla University
Asia/Bangkok timezone

Recycling Perovskite Solar Cell by Novel Spray Processes

Not scheduled
15m
Faculty of Science, Prince of Songkla University

Faculty of Science, Prince of Songkla University

Oral Environmental Physics, Atmospheric Physics, Geophysics and Renewable Energy

Speaker

Teepich Houtae (Mahidol University)

Description

Perovskite solar cells have had rapid growth in their performance and efficiency over just a few years. To achieve high performance, the perovskite absorbers require high crystallinity and good surface morphology. However, the solar cells still ends up as wastes at the end of their life time. The problem is exacerbated by the solar cells’ relatively poor stability where perovskite materials (CH3NH3PbI3) can be degraded to PbI2 waste films with heat, humidity, or UV exposure. Boonthum et al developed a technique called repeated cation doping as a recycling process to convert PbI2 waste films back to perovskite thin films. Further efforts were done to improve PbI2 waste films prior to the recycling process by spinning low concentration solutions of PbI2 on top of the waste films to fill in pinholes on the PbI2 layers, which cause low device performance. The spinning process however has scale-up limitations and is uneconomical as a large portion of the solution is spun off as excess. In this study, a novel spray process was employed to fill in pinholes on PbI2 waste films. Furthermore, repeated cation doping was further improved, basing on spray process. Spray times, concentrations and annealing parameters were varied to determine the optimal conditions. The newly developed spray processes for recycling enable better film performance and economical uses of materials with scale-up potential.

Primary author

Teepich Houtae (Mahidol University)

Co-authors

Mr Zoubeir Saraw (Advanced Technologies for Energy and Sustainability Lab School of Materials Science and Innovation, Faculty of Science, Room SC1-255, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170 Thailand) Mr Koth Amratisha (Advanced Technologies for Energy and Sustainability Lab School of Materials Science and Innovation, Faculty of Science, Room SC1-255, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170 Thailand) Ms Atittaya Naikaew (Advanced Technologies for Energy and Sustainability Lab School of Materials Science and Innovation, Faculty of Science, Room SC1-255, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170 Thailand) Ms Pimsuda Pansa-Ngat (Advanced Technologies for Energy and Sustainability Lab School of Materials Science and Innovation, Faculty of Science, Room SC1-255, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170 Thailand) Ms Ladda Srathongsian (Advanced Technologies for Energy and Sustainability Lab School of Materials Science and Innovation, Faculty of Science, Room SC1-255, Mahidol University, 999 Phuttamonthon 4 Road, Salaya, Nakhon Pathom 73170 Thailand) Dr Pongsakorn Kanjanaboos (Mahidol University)

Presentation materials