Fullerene-based electrode interlayers for bandgap tunable organometal perovskite metal–semiconductor–metal photodetectors
Luo Wen, Yan Li-Zhi, Liu Rong, Zou Tao-Yu, Zhou Hang †
       

(a) Photographs of three-dimensional (3D) MAPb(I1−xBrx)3 ( 0 ⩽ x ⩽ 1 ) films on glass substrates. (b) The SEM images of MAPb(I1−xBrx)3 films; the scale bar is 200 nm. (c) The absorbance of the MAPb(I1−xBrx)3 films. The dotted line represents the illumination wavelength (500 nm) in our measurement. (d) Photocurrent of MAPb(I1−xBrx)3 ( 0 ⩽ x ⩽ 1 )/fullerenes photodetectors when biased at 5 V under light illumination at 500 nm with an intensity of 2 mW/cm2. (e) Responsivity and specific detectivity and of MAPb(I1−xBrx)3/fullerenes photodetectors. (f) ON/OFF ratio of MAPb(I1−xBrx)3/fullerenes photodetectors.