The development of methods for implementing solid state imaging electronics on flexible substrates could impact areas including conformable infrared detection, night vision, and medical imaging. Various unconventional mechanisms for solid state imaging have been demonstrated. However, solid state imaging electronics have rarely been developed in a flexible form factor, which is a critical format for next-generation devices such as wearable displays, conformable imaging arrays, and electronic paper. Among various potential mechanisms for solid state imaging, smart materials are particularly attractive due to their inherent ability for converting external stimuli into electrical signals directly. Here, we introduce a flexible photodetector array that is enabled by growing a barium strontium titanate (BST) film on a flexible substrate. A pixelated array is then patterned on the film. When a spatially resolved laser beam is rastered over the film, pixels are individually illuminated. By recording the signals from all pixels, the laser trace can be successfully reconstructed, thereby realizing a flexible photodetector array.
Bibliographical noteFunding Information:
We acknowledge the use of the Princeton Institute for the Science and Technology of Materials (PRISM) Imaging and Analysis Center, which is supported by the NSF MRSEC Program via the Princeton Center for Complex Materials (No. DMR-0819860 ). We thank Prof. Stephen A. Lyon and Dr. Alexei Tyryshkin for use of the xenon lamp. P.K.P. acknowledges support for this work by the Army Research Office (No. W911-NF-11-1-0494 ). M.C.M. acknowledges support for this work by the Army Research Office (No. W911NF-11-1-0397 ).
© 2016 Elsevier Ltd
- Barium strontium titanate
- Flexible imaging
- Photovoltaic effect