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Optics.org: A group of researchers from Empa and ETH Zurich publish a paper in Nature called "Non-dissipative internal optical filtering with solution-grown perovskite single crystals for full-colour imaging" by Sergii Yakunin, Yevhen Shynkarenko, Dmitry N Dirin, Ihor Cherniukh & Maksym V Kovalenko. The crystals of semiconducting methylammonium lead halide perovskites (MAPbX3, where MA=CH3NH3+, X=Cl−, Br− and Br/I−) are used as absorbers for full-color Foveon-like stacked imaging: |
| (a) Bayer color sensor design. (b) Vertically stacked color sensor design. (c) Schematic of the crystal structure of hybrid perovskites — materials with high optical absorption, efficient charge transport, and bandgap tunability. (d) Photograph of (from left to right) typical MAPbCl3, MAPbBr3 and MAPb(Br/I)3 single crystals. (e) Measured light absorption of each perovskite SC used in a stack. |
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| (a) Sketch of stacked SC photodetector. (b) Photograph of the prototype detector assembled from three SCs stacked on a chip carrier. (c) Normalized photoconductivity spectra of the individual SCs in the stacked detector presented in b. |
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