Developing wide bandgap Perovskite Photovoltaics for Indoor Applications
Noor Alotaibi a
a Department of Physics and Astronomy, University of Sheffield, UK, Hounsfield Road, United Kingdom
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
València, Spain, 2024 May 12th - 15th
Organizer: Bruno Ehrler
Poster, Noor Alotaibi, 228
Publication date: 6th February 2024

Perovskite solar cells (PSCs) are currently emerging as one of the most promising thin-film photovoltaic technologies owing to their unique properties that have attracted the research community’s attention, pushing them to accelerate the development of these technologies. As a result, the power conversion efficiency of PSCs has increased at a very rapid rate and within a relatively short period of time, reaching more than 25% [1]. Wide band gap perovskites for indoor perovskite photovoltaics also have gained their portion of research interest, as they have the capability to power a variety of low-power electronic devices, demonstrating their success at supporting the expanding Internet of Things (IoT) [2]. They also have their applications as top cells in tandem photovoltaic since they are capable to harvest high energy photons and reduce thermalization losses. However, wide band gap perovskites suffer from phase segregation and non-radiative recombination losses. In our project, we are developing wide bandgap (~1.9eV) perovskites with a chemical composition of CsFAPbIBr to be used for indoor and tandem applications. Additive engineering strategy was employed adding different concentrations of Methylammonium iodide (MAI) and Potassium thiocyanate (KSCN) to the perovskite precursor solution. This strategy could supress phase segregation and enhance photostability of wide bandgap perovskites [3]. We fabricated solar cells in an inverted configuration utilising the spin coating technique. Under 1 sun condition (AM1.5G), our devices demonstrated a notable enhancement in the power conversion efficiency of about 50% and achieved a high open-circuit voltage (Voc) of 1.23V.

REFERENCES:

[1] C. Dong, X. Li, C. Ma, W. Yang, J. Cao, F. Igbari, Z. Wang, and L. Liao, Advanced Functional Materials 31, 2011242 (2021).

[2] I. Mathews, S.N.R. Kantareddy, S. Sun, M. Layurova, J. Thapa, J. Correa‐Baena, R.

Bhattacharyya, T. Buonassisi, S. Sarma, and I.M. Peters, Advanced Functional Materials 29, 1904072 (2019).

[3] F. Xu, E. Aydin, J. Liu, E. Ugur, G.T. Harrison, L. Xu, B. Vishal, B.K. Yildirim, M. Wang, R. Ali, A.S. Subbiah, A. Yazmaciyan, S. Zhumagali, W. Yan, Y. Gao, Z. Song, C. Li, S. Fu, B. Chen, A. ur Rehman, M. Babics, A. Razzaq, M. De Bastiani, T.G. Allen, U. Schwingenschlögl, Y. Yan, F. Laquai, E.H. Sargent, and S. De Wolf, Joule 8(1), 224–240 (2024).

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