Sensitive, Fast, and Stable Perovskite Photodetectors Exploiting Interface Engineering
AuthorsSutherland, Brandon R.
Johnston, Andrew K.
Ip, Alexander H.
Sargent, Edward H.
KAUST Grant NumberKUS-11-009-21
Permanent link to this recordhttp://hdl.handle.net/10754/599592
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Abstract© 2015 American Chemical Society. Organometallic halide perovskites are a class of solution-processed semiconductors exhibiting remarkable optoelectronic properties. They have seen rapid strides toward enabling efficient third-generation solar cell technologies. Here, we report the first material-tailoring of TiO2/perovskite/spiro-OMeTAD junction-based photodiodes toward applications in photodetection, a field in need of fast, sensitive, low-cost, spectrally tunable materials that offer facile integration across a broad range of substrates. We report photodetection that exhibits 1 μs temporal response, and we showcase stable operation in the detection of over 7 billion transient light pulses through a continuous pulsed-illumination period. The perovskite diode photodetector has a peak responsivity approaching 0.4 A W<sup>-1</sup> at 600 nm wavelength, which is superior to red light detection in crystalline silicon photodiodes used in commercial image sensors. Only by developing a composite Al2O3/PCBM front contact interface layer were we able to stabilize device operation in air, reduce dark current, and enhance the responsivity in the low-bias regime to achieve an experimentally measured specific detectivity of 10<sup>12</sup> Jones.
CitationSutherland BR, Johnston AK, Ip AH, Xu J, Adinolfi V, et al. (2015) Sensitive, Fast, and Stable Perovskite Photodetectors Exploiting Interface Engineering. ACS Photonics 2: 1117–1123. Available: http://dx.doi.org/10.1021/acsphotonics.5b00164.
SponsorsThis publication is based in part on work supported by an award (KUS-11-009-21) from the King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. The authors thank Dr. F. Pelayo García de Arquer for helpful discussion regarding noise current measurements and Dr. Michael Saliba for consultation on perovskite device processing.
PublisherAmerican Chemical Society (ACS)