Solar Battery

1. Solar cell application industry


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2. Solar cell market demand


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3. Overview of the Solar Energy Industry Chain



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4. Types of solar cells

  • Overview of solar types

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  • Comparison table of types of solar cells


Single crystal
Polycrystalline
Compound
Amorphous
Copper Indium Gallium Selenide
Organic Department

Other compounds
semiconductor

 Main ingreadient
c-Si
poly-Si
GaAs / InP
a-Si/a-SiC/
a-
SiGe
CuInSe2
TiO2/Dye
CdTe
 Battery conversion efficiency
14%~24%
11%~17%
18%~40%
8%~13%
10%~12%
7%
10%~12%
Module conversion efficiency
10%~16%
9%~12%
10%~25%
6%~9%
8%~10%
-
8%~10%
 Cost per watt
$ 3
2.8
>10
1.2
about $ 0.6
-
-
 Main application areas
Land and space power
Land power
Land power Terrestrial power consumption
Terrestrial power consumption
-
Terrestrial power consumption
 Energy payback period
2.1 years
2.3 years
-
1.6 years
More than 6 months
More than 1 year
-
 Advantage
1. Durable
2. High performance
1. Simple process
2. Lower cost
3. Can be mass produced
1. High barriers to entry
2. Super high performance
1. Simple operation process
2. Low material cost
1. Good expiration date
2. Low cost
3. The highest efficiency among thin film batteries
4. Easy process
1. Easy process
2. Low cost
1. Mature development
2. Thin and light
 Disadvantage
1. Low barriers to entry
2. Higher manufacturing cost
1. Low barriers to entry
2. Low conversion efficiency
Need to use complex and expensive tracking system.
1. Performance degradation
2. Low induced electricity
3. Low conversion efficiency
1. The process is not standardized
2. Limited indium reserves
1. Short use time
2. Low conversion efficiency
1. Tellurium reserves are limited
2. Cadmium has pollution problems
3. Higher cost


  • Comparison table of silicon thin film and compound semiconductor thin film solar cells

Silicon film
Amorphous
Compound semiconductor
CdTe
CIGS
 Main ingreadient
Silicon
Tellurium and cadmium compounds
Copper, indium, gallium, selenium compounds
 Raw material characteristics
The main raw material is silyl methane, which is used in a small amount and can be easily supplied.
  • Tellurium is a minority metal and it is difficult to cope with the massive market demand.
  • Cadmium and tellurium are toxic metals, which are easily restricted by environmental protection laws and regulations.
  • Gallium and selenium are a few metals, and it is difficult to meet the large demand in the market.
  • Cadmium sulfide buffer layer is potentially toxic.
 Commonly used film forming technology
  • Sputtering (not yet mass industrial production)
  • Chemical Vapor Deposition (CVD)
Evaporating, suitable for a variety of rapid film forming technology
Sputtering + Evaporating
Light absorption capacity
Limited absorbable spectrum
Wide light absorption range
Wide light absorption range
 Energy gap range
1.1 eV ~1.7eV
1.45eV
1.02 eV ~1.68eV
 Light absorption layer thickness
0.2~0.5μm
1μm
<1μm
 Commercial conversion efficiency
5%~14.0%
8.5%~20.1%
10%~20.4%
 Power generation stability
There is light exhaustion and poor stability, which can be improved by tandem technology.
No light exhaustion phenomenon, good stability.
No light exhaustion phenomenon, good stability.



5. Solar cell manufacturing process

  • Polycrystalline silicon solar cell manufacturing process

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  • Thin film solar cell manufacturing process

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6. Dahyoung - Coating Solutions for Solar Cells

  • Anti-reflective film (VIS/NIR)-Design material: SixNy, SiO2, can be adjusted/optimized according to requirements
  • Multi-angle color filter-design material: SixNy, SiO2, 5~30 degree angles are all orange, can be adjusted/optimized according to needs


Dahyoung: two-stage reactive sputtering process



Dahyoung: Film results


2021-03-24