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Perovskite film morphology structure detection method based on digital holography

A technology of digital holography and detection method, which is applied to measurement devices, material analysis by optical means, instruments, etc., can solve the problem of high cost, and achieve the effect of low cost, low test condition requirements and simple structure

Pending Publication Date: 2021-03-19
KUNMING UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD) and other methods are usually used to detect the morphology of perovskite thin films; however, these methods have special requirements for detection conditions and are costly

Method used

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  • Perovskite film morphology structure detection method based on digital holography
  • Perovskite film morphology structure detection method based on digital holography
  • Perovskite film morphology structure detection method based on digital holography

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Embodiment 1

[0021] A method for detecting the morphology and structure of perovskite films based on digital holography, the optical path diagram is as follows figure 1 As shown, the specific steps are as follows:

[0022] (1) The light emitted by the laser 1 is expanded and collimated through the first collimation system (objective lens I2, pinhole I3, collimator lens I4), and the parallel light is divided into two beams by the beam splitter 5, one beam is the object One beam of light O is the reference light R; the object light O is reflected by the mirror I6, and passes through the perovskite film 11 of the measured object. The perovskite film is coated on the glass substrate and placed in the heatable carrier 10. The heatable carrier 10 is a frame structure, surrounded by the perovskite film 11, which can be heated at a constant temperature; the heatable carrier 10 is respectively connected with the temperature control device 21 and the liquid crystal display 22; the object light passe...

Embodiment 2

[0028] The method described in this embodiment is the same as that in Embodiment 1, except that the object light O is reflected by the reflector I6, then reflected on the surface of the perovskite film glass substrate, and then reflected by the reflector III19 and enters the third collimation system ( pinhole Ⅲ12, collimating lens Ⅲ13) collimation; reference light R is reflected by mirror Ⅱ18, and then reflected by mirror Ⅳ20, enters the second collimation system (small hole Ⅱ7, collimating lens Ⅱ8) for collimation, and the rest It is the same as the transmission optical system.

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Abstract

The invention discloses a perovskite film morphology structure detection method based on digital holography, and belongs to the technical field of perovskite film production and detection. According to the method, a laser device, an objective lens, a small hole, a collimating lens, a beam splitter prism, a reflector, a microscope objective lens, a heatable carrier, a beam combiner prism, a CCD camera and a computer are included. The method comprises the steps: respectively placing perovskite films in a transmission-type or reflection-type holographic light path by using a digital holographic technology, shooting different regions of the perovskite films at normal temperature for multiple times with the heated perovskite films, and acquiring holograms by using a CCD; and processing and analyzing the phase information obtained by the holograms to judge the morphology structure condition and the stability of the perovskite films.

Description

technical field [0001] The invention relates to a method for detecting the morphology structure of a perovskite film based on digital holography, and belongs to the technical field of perovskite film production and detection. Background technique [0002] At present, scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD) and other methods are usually used to detect the morphology of perovskite thin films; however, these methods have special requirements for detection conditions and are costly . [0003] Traditional holography uses the principle of interference and diffraction of coherent light waves to record the interference information between the object light carrying object information and the reference light wave on the holographic dry plate, and can reproduce the three-dimensional image information of the object through the diffracted light waves of the hologram. Digital holography uses photoelectric imaging devices instead of holog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/84
CPCG01N21/01G01N21/8422
Inventor 晒旭霞李洁宋谢飞钱晓凡李昊祥
Owner KUNMING UNIV OF SCI & TECH
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