Multieffect coupled NGs for self-powered photodetectors. (a) Photodetection performance of a pyro-photovoltaic NG for monitoring 405 nm light, where ,,, and are associated with pyro-photovoltaic effect, and ,,, and are associated with photovoltaic effect . Copyright 2017, Wiley. (b) Detection performance of a thermo-photovoltaic NG for sensing 365 nm light . Copyright 2019, Wiley. (c) Performance of pyro-photovoltaic and thermo-photovoltaic NGs for distinguishing light wavelength . Copyright 2018, Elsevier. (d) Performance of a thermo-photovoltaic NG for detecting 760 nm light . Copyright 2019, Elsevier.