Ferroelectric circularly polarized photovoltaic effect driven circularly polarized light detector and preparation method thereof

A technology of circularly polarized light and ferroelectrics, applied in the field of photodetectors, can solve problems such as changing the response of circularly polarized light, and achieve the effects of changing the response, simple preparation method, and simple structure

Pending Publication Date: 2022-02-11
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in existing ferroelectrics, an external electric field is required to cause the conversion of enantiomers, thereby changing the response to circularly polarized light.

Method used

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  • Ferroelectric circularly polarized photovoltaic effect driven circularly polarized light detector and preparation method thereof
  • Ferroelectric circularly polarized photovoltaic effect driven circularly polarized light detector and preparation method thereof
  • Ferroelectric circularly polarized photovoltaic effect driven circularly polarized light detector and preparation method thereof

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specific Embodiment approach

[0022] A ferroelectric circularly polarized photovoltaic effect-driven circularly polarized light detector, the detector includes an insulating base layer, and an optically active halide perovskite ferroelectric single chip is arranged on one side of the insulating base layer layer and a set of metal electrode groups plated on the free surface of the single wafer.

[0023] The insulating base layer is made of glass, mica or PET.

[0024] The optically active halide perovskite ferroelectric monolithic layer consists of (ethylamine) 4 Pb 3 Br 10 Single crystal, (n-butylamine) 2 CaPb 2 Br 7 Single crystal, (n-butylamine) 2 Methylamine Pb 2 Br 7 Made of single crystal.

[0025] The optically active halide perovskite ferroelectric monolithic layer of the present invention has a circularly polarized photovoltaic effect, and can generate a photocurrent that varies with the polarization angle under excitation of circularly polarized light, thereby realizing a self-driven circ...

Embodiment 1

[0029] The optically active halide perovskite ferroelectric in this embodiment is a single crystal (ethylamine) 4 Pb 3 Br 10 . In this example, (ethylamine) 4 Pb 3 Br 10 Crystallized in the space group C2cb, it has optical activity and can produce circularly polarized photovoltaic effect. The insulating substrate is made of glass substrate, the metal electrodes are made of gold Au, and the distance between the metal electrodes is about 100 μm.

Embodiment 2

[0031] The optically active halide perovskite ferroelectric of this embodiment is (n-butylamine) 2 CaPb 2 Br 7 . In this embodiment, (n-butylamine) 2 CaPb 2 Br 7 Crystallized in the space group Cmc2 1 , with optical activity, can produce circularly polarized photovoltaic effect. The insulating substrate is made of glass substrate, the metal electrodes are made of gold Au, and the distance between the metal electrodes is about 100 μm.

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Abstract

The invention relates to a ferroelectric circularly polarized photovoltaic effect driven circularly polarized light detector and a preparation method thereof. The detector comprises an insulating substrate layer, a halide perovskite ferroelectric single crystal wafer layer which is arranged on one side surface of the insulating substrate layer and has optical activity, and a metal electrode group which is plated on the free surface of the single crystal wafer. According to the ferroelectric circularly polarized photovoltaic effect driven circularly polarized light detector, bias voltage does not need to be added, light current changing along with the polarization angle can be generated under excitation of circularly polarized light, self-driven circularly polarized photoelectric detection can be achieved, the structure is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of photodetectors, in particular to a ferroelectric circularly polarized photovoltaic effect-driven circularly polarized light detector and a preparation method. Background technique [0002] Polarized light refers to a light wave in which the vibration direction of the light vector is constant, or has certain regular changes. According to its properties, polarized light can be divided into linearly polarized light, circularly polarized light and elliptically polarized light. The trajectory of the light vector end point of the circularly polarized light is a circle, that is, the light vector rotates continuously, and its size remains constant, but its direction changes regularly with time. Circularly polarized light detection has important application value in the fields of spin optics information security detection and drug screening. The traditional circularly polarized photodetector realizes the measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J4/00
CPCG01J4/00
Inventor 刘希涛李霄琪邬发发罗军华
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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