This letter presents studies of multiwavelength flexible photodetectors on a plastic substrate by use of printing transferred single-crystal germanium (Ge) membranes. Ge membranes of thickness with selectively ion-implantation doped regions were released from a germanium-on-insulator substrate and integrated with a -thick polyethylene terephthalate substrate via a dry printing technique. Photodiodes configured in lateral configuration using the flexible Ge membranes with an intrinsic region width of exhibit an external quantum efficiency that varies from 5% at to 42% at under bias condition. These results demonstrate the potential of utilizing single-crystal Ge-membrane photodiodes for imaging applications and as solar cells on objects with arbitrary curvatures and shapes.
Flexible photodetectors on plastic substrates by use of printing transferred single-crystal germanium membranes
Hao-Chih Yuan, Jonghyun Shin, Guoxuan Qin, Lei Sun, Pallab Bhattacharya, Max G. Lagally, George K. Celler, Zhenqiang Ma; Flexible photodetectors on plastic substrates by use of printing transferred single-crystal germanium membranes. Appl. Phys. Lett. 5 January 2009; 94 (1): 013102. https://doi.org/10.1063/1.3062938
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