Unveiling the Degradation mechanism of Perovskite Solar Cells by the Laser Desorption/Ionization Mass Spectrometry
Nishat Sultana a, Nicholas J. Demarais a, Denys Shevchenko b
a Department of Physics, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
b Solomya, Myskdalen 58, SE 75597 Uppsala, Sweden
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Roma, Italy, 2019 May 12th - 15th
Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo
Oral, Nishat Sultana, presentation 062
DOI: https://doi.org/10.29363/nanoge.hopv.2019.062
Publication date: 11th February 2019

Perovskite solar cells (PSCs) have achieved  rapid improvement in efficiencies starting from 3.8% in 2009 to over 20% in 2018 within a short period.  Due to their fast degradation, it is still a challenge to commercialize PSCs despite the promising enhancement in device efficiencies. Thus, it is necessary to probe the whole device in their operating condition to understand the degradation mechanism of each layer as well as intra-device reactions. In the present work, we have used laser desorption/ionization mass spectrometry (LDI-MS) to investigate the molecular interactions as well as the degradation products directly in complete perovskite solar cells. LDI-MS is a soft ionization process and has been used widely to analyze drugs, soft biological tissues, organometallic compounds, and thin films. By using this technique, we were able to observe chemical transformations such as corrosion of metal electrode, degradation of adjacent charge transport layers, incorporation of oxygen atoms into perovskite and formation of charge transfer complex between perovskite and hole transport layer [1].  We show that LDI-MS is a promising technique to observe intra-device reactions in PSCs. We believe our obtained results may shed light on the degradation mechanism inside PSCs which will, in turn, be helpful to increase the stability of the perovskite solar cells and make their commercialization feasible.  In life science research, LDI-MS method has already become an inevitable analytical tool. We believe this method has the potential to benefit the field of solar cell studies as well.

Keywords: Laser desorption/ionization mass spectrometry, perovskite solar cells

Authors acknowledge The University of Auckland and Ministry of Business,Innovation and Employment (MBIE) New Zealand for funding the work.

© Fundació Scito
We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info