Sensitive, Fast, and Stable Perovskite Photodetectors Exploiting Interface Engineering

• DOI: 10.1021/acsphotonics.5b00164
• Publication Date: 2015-06-18T17:40:11Z
• Authors: Brandon R. Suther...; Andrew K. Johnston; Alexander H. Ip; Jixian Xu; Valerio Adinolfi; Pongsakorn Kanjan...; Edward H. Sargent
• Keywords: Photodetection; Photodiode; Specific detectivity

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 TiO2/perovskite/spiro-OMeTAD junction-based photodiodes applications in photodetection, field need fast, sensitive, low-cost, spectrally tunable materials that offer facile integration across broad range substrates. We photodetection exhibits 1 μs temporal response, and showcase stable operation detection over 7 billion transient light pulses through continuous pulsed-illumination period. The perovskite diode photodetector has peak responsivity approaching 0.4 A W–1 at 600 nm wavelength, which is superior to red crystalline silicon used commercial image sensors. Only by developing composite Al2O3/PCBM front contact interface layer were able stabilize device air, reduce dark current, enhance low-bias regime achieve an experimentally measured specific detectivity 1012 Jones.