Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
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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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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