AI Article Synopsis
- Self-powered photodetectors (PDs) leverage both photovoltaic and newly discovered pyro-phototronic effects for enhanced performance, particularly when external strain is applied.
- Under specific UV illumination and compressive strain, the combined effects can dramatically boost the PD's photocurrent by over 600%.
- Theoretical simulations help explain the mechanisms at play and underline the potential of these effects for improving optoelectronic devices across various light wavelengths.
Article Abstract
Self-powered photodetectors (PDs) have long been realized by utilizing photovoltaic effect and their performances can be effectively enhanced by introducing the piezo-phototronic effect. Recently, a novel pyro-phototronic effect is invented as an alternative approach for performance enhancement of self-powered PDs. Here, a self-powered organic/inorganic PD is demonstrated and the influences of externally applied strain on the pyro-phototronic and the photovoltaic effects are thoroughly investigated. Under 325 nm 2.30 mW cm UV illumination and at a -0.45% compressive strain, the PD's photocurrent is dramatically enhanced from ≈14.5 to ≈103 nA by combining the pyro-phototronic and piezo-phototronic effects together, showing a significant improvement of over 600%. Theoretical simulations have been carried out via the finite element method to propose the underlying working mechanism. Moreover, the pyro-phototronic effect can be introduced by applying a -0.45% compressive strain to greatly enhance the PD's response to 442 nm illumination, including photocurrent, rise time, and fall time. This work provides in-depth understandings about the pyro-phototronic and the piezo-phototronic effects on the performances of self-powered PD to light sources with different wavelengths and indicates huge potential of these two effects in optoelectronic devices.
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| http://dx.doi.org/10.1002/adma.201606698 | DOI Listing |
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