Section 8 _B_ PV Thin Film a-Si - Visionary Lighting _ Energy India

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Section 8 _B_ PV Thin Film a-Si - Visionary Lighting _ Energy India Powered By Docstoc
					Solar Panel/Module

   By Tadpole Digital




                        1
           Agenda
1. Thin Film a-Si Introduction

3. Process Introduction

4. PV System and Applications

5. Q&A




                                 2
       Thin Film a-Si Solar
       Module Introduction



mono-crystaline




                  poly-crystaline



                                    amorphous silicon

                                                        3
                         Solar Cell Category

                                   Solar Cell


    Next Generation - Thin Film                    Current Generation Crystalline



Si Thin-Film          Organic      Compound             Compound             Crystalline
   a-Si               DSSC           CdTe                  GaAs              mono c-Si
   µc-Si             Polymer       CIS / CIGS                                poly c-Si
a-Si / µc-Si                                                                   HIT



DSSC : Dye-Sensitized Solar Cell         CIS/CIGS : Cadmium Indium (Gallium) Diselenide
CdTe : Cadmium Telluride                 HIT : Heterojunction with Intrinsic Thin Layer

                                                                                          4
     Thin Film a-Si Solar Module Structure

                      Junction Box
              including cable, connector and         Al Frame
                      electrode box

                                     electrode box
Back sheet

                                                           Al foil
 EVA                                                      AZO
                                                          a-Si
                                                          SnO2
                                                          SiO2
                           glass



                                                                5
                 Prospective in Cost Point Of View

                 5
                                            Cd is toxic material
                 4      mono c-Si    CdTe   Te is limited material
Module Pricing




                         poly c-Si
                 3
                                            In and GA is limited material
                        Thin-Film    CIGS   Manufacturing cost
                 2

                 1                          a-Si, a-Si /μa-Si ,
                        lower cost   a-Si   a-Si / a-SiGe

                 0

                                                                      6
     Advantage of Thin-Film a-Si Solar Cell
1. No Constraint by Si Material                     2. Accumulated Power Generation
                                                    • Thin film solar cell is more sensitive
• Due to limited Si material and wafer                to low luminant environment.
  quantity, crystalline type of solar cell
  is constrained in both production and             • In low luminant environment (indoor
  cost.                                               or cloudy day), thin film solar cell
                                                      generated more power.




                                       From Kaneka web site                                    7
   Advantage of Thin-Film a-Si Solar Cell
5. Better for BIPV

• The building appearance of BIPV
  using a-Si type is much better than
  crystalline type.
• Encapsulation on a-Si type is much
  easier than crystalline type.
• a-Si type solar panel is easier to
  adopt for building design and is more
  value added.




                                            8
         Cumulative Power Comparison

                           Crystalline, Bright day
       a-Si, Bright day




                                               a-Si, Overcast

                                        Crystalline, overcast day




source: www.icpsolar.com

                                                           9
   Energy research Centre of Netherland Test
        Result for Accumulated Power
                                            Photon International, Nov. 2000 p11




• In Netherland, ECN tested 9 branded crystalline and a-Si type solar cell. The top 3 panels
  with accumulated power generation over 1000KW are all with a-Si panel.
• ECN research indicates : 1) a-Si can operate at lower luminant environment at higher
  efficiency 2) a-Si is more stable over temperature.
                                                                                          10
    Advantage of Thin-Film a-Si Solar Cell
3. Large Size Panel                             4. Shorter Energy Pay Back Time

• Adopt large size panel manufacturing          • EPT (Energy Payback Time) is one
  equipment and hence lower down cost.            of the important index to measure
• Cooperate with lower material cost and          the solar cell in environmental
  matured high efficient manufacturing            protection. It indicates the ratio of
  equipment to reach a high potential             energy used for manufacturing and
  market.                                         the energy it generated. EPT for a-Si
                                                  is much lower than crystalline type.




                                   From Kaneka web site                              11
                         ECN Test Report
                    Field Test in Holland: ECN
                                                             Panel Output   System Output
   Brand        Model             Type         Efficiency
                                                              (kWh/Kw)        (kWh/Kw)

  BP Solar      BP 585            mc-Si          13.5%           977            868

  Kyocera        KC 60            pc-Si          12.3%           964            856

Siemens Solar    S 30             mc-Si          9.4%            930            824

Siemens Solar   SM-55             CIGS           12.9%           963            855

 Uni-Solar       US-32             a-Si          6.1%            1164           1038

    ASE         ASE-100        pc-Si (EFG)       12.9%           966            857

Free Energy      A13P              a-Si          4.1%            1084           961
  Europe

  BP Solar      MST 43             a-Si          5.3%            1001           888

 Shell Solar    RSM 75            pc-Si          10.3%           961            853


                          Source: Photon, Nov. 2000, pp. 10-11
                                                                                       12
             Efficiency ≠Power Produced
    Factors to affect power producing :
       •Temperature
       •Low Luminant Environment
       •Environmental Light Spectrum

                                                Annual Yield               Annual Yield
     MODULE           TECHNOLOGY               Spain 39D57N                UK 51D46N
                                           KWH/KWp            %       KWH/KWp           %
 BP Solar 585 13% Mono-Si                      1341          ref          774           ref
 ASE 30 DG-UT 6% a-Si (double junction)        1706         +27.2         969         +25.2
                        17th European PV Solar Energy Conference, Munich, Germany, Oct 2001



It is accumulated power output, not the
efficiency, values the solar panel.
                                                                                              13
               Temperature Effect
  Solar Panel Temperature Coefficient
          c-Si = - 0.50% / o C
          a-Si = - 0.26% / o C
                           Module Efficiency
                      25oC       45oC                       65oC
c-Si                   12        10.8                        9.6
a-Si                   6         5.69                        5.38
a-Si+a-Si              12       11.38                       10.75

      Source : 26th IEEE PV Special Conference, Sep.29-Oct.3, 1997
                                                                     14
Process Introduction




                       15
                  Process Introduction
Glass Substrate       Wash             APCVD         Wash      Laser Scribing




    Wash             PECVD          Laser Scribing   Sputter   Laser Scribing




Quality Check     Al Foil Bonding    Encapsulate     IV Test      Packing
                   導電膜黏合              EVA 封裝         電性測試           包裝




                                                                            16
PV System and Applications




                             17
   Product Lines

    Thin Film a-Si Solar Cell
     PV Power System
a-Si Cell for Indoor Consumer
 a-Si for Outdoor Consumer
      Solar Application




                                18
               PV Power System

   Small Scale PV Power
    System

   Off Grid PV Power           10.54KWatt System           20KWatt System
                              (Chu-Nan Science Park)        (Hsin-Chu Office)
    System

   On Grid PV Power
    System

   Large Scale PV Power
    System                 Solar Powered Bulletin Board     10.5KWatt System
                                  (Taipei Airport)        (Office of the President)
                                                                             19
Solar Powered Street Light




                             20
    Solar Power Consumer Application



Garden/Parasol Lights   Mobile Phone Charger   Automobile
                                                Radiator




 Portable Electronics        Solar Watch       Street Lamp



                                                             21
Section 8 (E) PV Street Lighting Power Budget

          ENEL 581 Lec. # 12
       Completed Thur. 15 Oct. 2009




                                                22

				
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