Proceedings of Online International Conference on Hybrid and Organic Photovoltaics (OnlineHOPV20)
Publication date: 22nd May 2020
The continued development of formulations and architectures for hybrid perovskite films and devices requires understanding of the micro- and nano-scale morphology and chemistry. Scanning Electron Microscopy (SEM) is routinely used for assessing such properties, but more in-depth information can be obtained by performing Scanning / Transmission Electron Microscopy (S/TEM) on cross-sectional specimens. The procedures are challenging due to the sensitivity of hybrid perovskites to local charging and heating, but can reveal information on local structure and homogeneity that is highly valuable in understanding the results of synthesis protocols and the physical and chemical processes happening during operation and ageing.
Here we present a selection of case studies where S/TEM has been used, in conjunction with advanced data processing routines, to provide insight on issues such as conversion of precursors into perovskite, heat-induced changes from laser scribing, distribution of dopants in the hole transporting layers, degradation in operation and identification of non-radiative trap sites.
The Authors thank all the collaborators who prepared perovskite films in the various institutions. Funding sources include the European Union Horizon 2020 research and innovation program under grant agreement number 823717 - ESTEEM3, the Henry Royce Institute (EP/P024947/1 and EP/R00661X/1), and the Jardine Foundation and Cambridge Trust for the doctoral scholarship of F.U.K.
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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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