Perovskite-sensitized near-infrared-to-green upconversion
AssigneeThe Florida State University Research Foundation, Inc.
InventorLea Nienhaus
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Abstract
In one aspect, the disclosure a system for near infrared-to-green upconversion of light in solid-state optoelectronic devices, the system comprising a bulk semiconductor layer capable of absorbing a near-infrared first wavelength of light and an organic annihilator in contact with the bulk semiconductor, wherein the organic annihilator is capable of upconversion via triplet-triplet annihilation from triplet states in the organic annihilator to produce green light at a second wavelength. In one aspect, the bulk semiconductor can be a formamidinium-based metal halide perovskite and the organic annihilator can be a polycyclic aromatic hydrocarbon or derivative thereof. Also disclosed are devices incorporating the same and methods for upconverting near infrared light to green light.
Claims18
A system for near infrared-to-green upconversion of light in a solid-state optoelectronic device, the system comprising a bulk semiconductor layer capable of absorbing a near-infrared first wavelength of light and an organic annihilator in contact with the bulk semiconductor, wherein the organic annihilator is capable of upconversion via triplet-triplet annihilation from triplet states in the organic annihilator to produce green light at a second wavelength, and wherein the organic annihilator comprises a derivative of a polycyclic aromatic hydrocarbon (PAH) selected from 1-chloro-9,10-bis(phenylethynyl) anthracene (1-CBPEA), naphtho[2,3-a]pyrene (NaPy), or a combination thereof.
A method for upconverting near infrared light to green light, the method comprising:
- (a) exposing a bulk semiconductor layer to a near-infrared first wavelength of light;
- and
- (b) upconverting the near-infrared light in an organic annihilator in contact with the bulk semiconductor to green light at a second wavelength;
- wherein the first wavelength is between about 650 nm and about 1200 nm;
- wherein the first wavelength is from about 200 nm to about 400 nm greater than the second wavelength;
- and
- wherein the organic annihilator comprises a derivative of a polycyclic aromatic hydrocarbon (PAH) selected from 1-chloro-9,10-bis(phenylethynyl) anthracene (1-CBPEA), naphtho[2,3-a]pyrene (NaPy), or a combination thereof.
Dependencies are inferred from the claim text.