CN106324969A

CN106324969A - Front projection optical microstructure curtain based on black silicon thin-film solar cells

Info

Publication number: CN106324969A
Application number: CN201610802457.3A
Authority: CN
Inventors: 钱俊; 王子强; 廖宇
Original assignee: Sino Tech Co Ltd
Current assignee: Sino Tech Co Ltd
Priority date: 2016-09-05
Filing date: 2016-09-05
Publication date: 2017-01-11
Anticipated expiration: 2036-09-05
Also published as: CN106324969B

Abstract

The invention provides a front projection optical microstructure curtain based on black silicon thin-film solar cells, which at least comprises a PET substrate layer, and is characterized in that the PET substrate layer is provided with triangular black silicon thin-film solar cells which are distributed in a microarray manner; the longitudinal section of the triangular black silicon thin-film solar cells is of a triangular structure; each black silicon thin-film solar cell is formed by vertically stacked layers, the layer located at the bottom part is a metal back electrode, the layer located at the top part is a metal gate electrode, and the longitudinal section of each layer is of a triangular shape; the upper surface of a black silicon light absorbing layer is densely provided with bulges with a pyramid microstructural shape, when external ambient light irradiates to the black silicon light absorbing layer from all angles, the light is reflected and absorbed among the bulges until being completely absorbed by the black silicon light absorbing layer, so that the black silicon thin-film solar cells convert the absorbed solar energy into electric energy; and the metal back electrode can reflect light irradiated from obliquely below.

Description

A kind of just throwing optical microstructures curtain based on black silicon film solar batteries

Technical field

The invention provides a kind of optical microstructures curtain, particularly provide one and external environmental light can either be resisted to disturb, Can absorb again luminous energy is converted into the just throwing optical microstructures curtain based on black silicon film solar batteries of electric energy simultaneously, belongs to Optical material technical field.

Background technology

Projection screen is under daylight or light affect, and the contrast of institute's projection picture, saturation are greatly reduced, and color is also Originality is undesirable, therefore uses projection screen under high-brightness environment, solves ambient light and the interference of drop shadow effect is just seemed outstanding For important.

In existing optics curtain, U.S. patent Nos US6842282B2 uses soot layer and grating layer to combine Structure, use the traceability reflex characteristic of glass microballoon, and absorb component environment light with the blacking sidewall of grating, improve throwing The contrast of shadow image, but owing to the glass microballoon intrinsic feature of characteristic of tracing to the source makes partially reflective light offset direction excessive, Projected image brightness drastically declines, and picture brightness loss is serious.Chengdu Fscreen Science & Technology Co., Ltd.'s patent of invention CN104062839A uses the structure that metal medium minute surface reflective membrane and microprism array structure layer and diffuse-reflectance layer combine, On a sidewall of microprism array structure layer, interpolation absorbed layer is to absorb ambient light, and metal medium minute surface reflective membrane is by high Specular reflectivity, be used for improving picture gain so that projected picture has a good contrast, but light used in this invention Absorbed layer material extinction efficiency is more low, and under the outdoor environment of high brightness, ambient light is the tightest on projected picture impact Weight, picture contrast, color rendition degree is all a greater impact, and the light reflected from metal medium minute surface reflective membrane can not Being all introduced into diffuse-reflectance layer, this makes some light lose, and drop shadow effect is had large effect.

Summary of the invention

The invention provides a kind of just throwing optical microstructures curtain based on black silicon film solar batteries, solve existing Deficiency in technology, this curtain can be greatly enhanced the absorbability to environmental disturbances light so that curtain is under bright light environments Can be with the reduction institute projected picture of high-contrast high saturation；The light that the most black silicon film solar batteries can also will be absorbed Again projector is powered after being converted into electric energy, energy-conserving and environment-protective.

Realizing the technical scheme that above-mentioned purpose of the present invention used is:

A kind of just throwing optical microstructures curtain based on black silicon film solar batteries, at least includes PET base layer, described The black silicon film solar batteries of triangular shape of distribution, two adjacent black silicon of triangular shape in microarray it are provided with on PET base layer Spacing between thin-film solar cells is not more than the 1/2 of projection image pixel；The black silicon film solar batteries of described triangular shape Longitudinal section structure triangular in shape, in described triangular structure, the angle between ramp and PET base layer is 30～90 degree, under Angle between inclined-plane and PET base layer is 30～65 degree；Described black silicon film solar batteries is by the metal gate of stacked on top of one another Electrode, black silicon light-absorption layer, P-type silicon layer, N-type silicon layer and metal back electrode composition, the level being wherein positioned at bottommost is metal Back electrode, the level being positioned at top is metal gate electrode, the equal triangular shape in longitudinal section of each level, and each triangle has one Individual common summit；

The projection in pyramid micro structure shape, described projection and projection it is densely covered with on the upper surface of described black silicon light-absorption layer Between root be connected, when extraneous ambient light exposes to black silicon light-absorption layer from all angles, light is at two micro-knots of pyramid Carry out multiple reflections absorption between the projection of structure shape until being hacked silicon light-absorption layer and thoroughly absorbing, thus black silicon film solar batteries will The solar energy absorbed is converted into electric energy；The light irradiated from obliquely downward can be reflected by described metal back electrode.

Angle between described ramp and PET base layer is 35 degree, and the angle between lower inclined plane and PET base layer is 55 Degree.

Compared with prior art, the invention have the advantages that 1, the present invention in the environment of high brightness, ambient light is from respectively Individual angular illumination on black silicon light-absorption layer, light between the projection of two pyramid micro structure shapes, carry out multiple reflections absorption until It is hacked silicon light-absorption layer thoroughly to absorb.And when the light that projector projects goes out projects curtain from obliquely downward, light projects On lower inclined plane, and the light irradiated from obliquely downward can be reflected by lower inclined plane, the light that therefore projector is projected Line enters human eye after reflection.So just throwing optical microstructures curtain based on black silicon film solar batteries provided by the present invention Cloth still can keep high-contrast and the color rendition degree of institute's projected picture in the environment of high brightness.2, the black silicon thin film sun After ambient light is absorbed by energy battery, it is also possible to further the luminous energy absorbed is converted into electric energy, can be again that projector provides Certain electric power supports, energy-conserving and environment-protective.

Accompanying drawing explanation

The vertical section structure figure of the optical microstructures curtain that Fig. 1 provides for the present invention；

Fig. 2 is the surface texture shape appearance figure of black silicon light-absorption layer；

Fig. 3 is the extinction principle demonstration figure of black silicon light-absorption layer；

In figure: 1-PET basal layer, 2-metal gate electrode, 3-black silicon light-absorption layer, 4-P type silicon layer, 5-N type silicon layer, 6-metal Back electrode.

Detailed description of the invention

Below in conjunction with the accompanying drawings and the present invention is done detailed specific description by specific embodiment, but protection scope of the present invention It is not limited to following example.

The structure just throwing optical microstructures curtain based on black silicon film solar batteries provided by the present invention such as Fig. 1 institute Show, described PET base layer 1 is provided with the black silicon film solar batteries of triangular shape of distribution, adjacent two three in microarray Spacing between the black silicon film solar batteries of horn shape is not more than the 1/2 of projection image pixel.The black silicon thin film of described triangular shape is too The longitudinal section structure triangular in shape of sun energy battery, in described triangular structure, the angle between ramp and PET base layer is 30 ～90 degree, the angle between lower inclined plane and PET base layer is 30～65 degree；As preferably in the present embodiment, described ramp with Angle between PET base layer is 35 degree, and the angle between lower inclined plane and PET base layer is 55 degree.

Described black silicon film solar batteries is by the metal gate electrode 2 of stacked on top of one another, black silicon light-absorption layer 3, P-type silicon layer 4, N Type silicon layer 5 and metal back electrode 6 form, and the level being wherein positioned at bottommost is metal back electrode 6, is positioned at the level of top For metal gate electrode 2.The equal triangular shape in longitudinal section of the most each level, and each triangle has a common summit.

The projection in pyramid micro structure shape, described projection and projection it is densely covered with on the upper surface of described black silicon light-absorption layer Between root be connected, as shown in Figure 2；When extraneous ambient light exposes to black silicon light-absorption layer from all angles, light is at two Multiple reflections absorption is carried out until being hacked silicon light-absorption layer and thoroughly absorbing, as shown in Figure 3 between the projection of pyramid micro structure shape.Thus The solar energy absorbed is converted into electric energy by black silicon film solar batteries；Described metal back electrode can irradiate from obliquely downward The light come reflects.

The based on black silicon film solar batteries of present invention offer just throws the optical microstructures curtain environment at high brightness During lower use, ambient light (electric light or sunlight, be normally at oblique upper) exposes to black silicon light-absorption layer from all angles, light Multiple reflections absorption is carried out until being hacked silicon light-absorption layer and thoroughly absorbing between the projection of two pyramid micro structure shapes.And when projection The light that instrument projects is when obliquely downward projects curtain, and light projects on lower inclined plane, and lower inclined plane can be by from tiltedly Lower section is irradiated the light come and is reflected, and the light that therefore projector is projected enters human eye after reflection.So the present invention The optical microstructures curtain of just throwing based on black silicon film solar batteries provided still can be protected in the environment of high brightness Hold high-contrast and the color rendition degree of institute's projected picture.

Claims

1. a just throwing optical microstructures curtain based on black silicon film solar batteries, at least includes PET base layer, its feature It is: on described PET base layer, be provided with the black silicon film solar batteries of triangular shape of distribution, adjacent two three in microarray Spacing between the black silicon film solar batteries of horn shape is not more than the 1/2 of projection image pixel；The black silicon thin film of described triangular shape is too The longitudinal section structure triangular in shape of sun energy battery, in described triangular structure, the angle between ramp and PET base layer is 30 ～90 degree, the angle between lower inclined plane and PET base layer is 30～65 degree；Described black silicon film solar batteries is by stacked on top of one another Metal gate electrode, black silicon light-absorption layer, P-type silicon layer, N-type silicon layer and metal back electrode composition, be wherein positioned at the layer of bottommost Secondary for metal back electrode, the level being positioned at top is metal gate electrode, the equal triangular shape in longitudinal section of each level, and each three Dihedral has a common summit；

It is densely covered with the projection in pyramid micro structure shape, root between described projection and projection on the upper surface of described black silicon light-absorption layer Portion is connected, and when extraneous ambient light exposes to black silicon light-absorption layer from all angles, light is at two pyramid micro structure shapes Projection between carry out multiple reflections absorption until being hacked silicon light-absorption layer and thoroughly absorbing, thus black silicon film solar batteries will be inhaled The solar energy received is converted into electric energy；The light irradiated from obliquely downward can be reflected by described metal back electrode.

Just throwing optical microstructures curtain based on black silicon film solar batteries the most according to claim 1, its feature exists In: the angle between described ramp and PET base layer is 35 degree, and the angle between lower inclined plane and PET base layer is 55 degree.