Department of Physics
Enhanced long wavelength omnidirectional photoresponses in photonic-structured perovskite photodetectors
Enhanced long wavelength omnidirectional photoresponses in organo-lead triiodide (CH3NH3PbI3) perovskite photodetectors (PDs) have been realized by incorporating a 1-D photonic-structured hole transporting layer (HTL), created by nanoimprint lithography. Our theoretical simulation supports the experimental results, revealing that photonic-structured CH3NH3PbI3 PDs enable efficient light absorption. Photonic-structured perovskite PDs also exhibit faster transient photoresponses as compared to a planar control PD over the wavelength range from UV to NIR. The photoresponsivity of photonic-structured PDs is less dependent on the angle of incident light, arising from the improved light in-coupling over a broader angle range of incident light. In particular, photonic-structured CH3NH3PbI3 PDs with unique features such as polarization-insensitive and enhanced long wavelength omnidirectional photoresponses are very attractive for application in high performance near infrared light detection.
Source Publication Title
Journal of Materials Chemistry C
Royal Society of Chemistry
Link to Publisher's Edition
Li, N., Lan, W., Lau, Y., Cai, L., Syed, A., & Zhu, F. (2019). Enhanced long wavelength omnidirectional photoresponses in photonic-structured perovskite photodetectors. Journal of Materials Chemistry C. https://doi.org/10.1039/C9TC02149C