Flexible CuInSe2 Nanocrystal Solar Cells on Paper

by Voggu, VR; Sham, J; Pfeffer, S; Pate, J; Fillip, L; Harvey, TB; Brown, RM; Korgel, BA

ACS ENERGY LETTERS; Volume: 2; Issue: 3; Pages: 574-581; DOI: 10.1021/acsenergylett.7b00001; Published: MAR 2017

Solar cells on paper have the potential to be inexpensive and portable due to several unique features of the substrate: paper is cheap, flexible, lightweight, biodegradable, and manufactured by roll-to-roll processing. Here, we report the first nanocrystal photovoltaic devices (PVs) made on 2 paper. Using spray-deposited CuInSe2 nanocrystals as the absorber material on substrates composed of bacterial CL) hansenii, these devices demonstrate excep-d cellulose nanofibers synthesized by the microorganism exceptional electrical and mechanical integrity. There is no significant loss in PV device performance after more than 100 flexes to 5 mm radius, and the devices continue to perform when folded into a crease. The practical use of these paper PVs is demonstrated with a prototype device powering liquid crystal displays (LCDs) mounted to various kinds of

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