Post on 15-Oct-2020
transcript
Status of Crystalline Silicon
PERC Solar Cells
Qi Wang
R&D Center
Zhejiang JinkoSolar
Jinko Solar Co., Ltd.
Dec 12-13, 2019 NIST/UL Workshop on Photovoltaic Materials Durability NIST, Gaithersburg, MD USA
INSERT TEXTContents
Solar manufacturing update1
PERC cell history and research update2
PERC cell in production3
PERC cell improvement4
Summary5
INSERT TEXTPERC Cell’s Market Share
INSERT TEXTPV Module ASP Trend
INSERT TEXTCast Mono Si PERC Record Cell
22.8%
From Canadian Solar. Inc
INSERT TEXTMono Si PERC Record Cell
24.03%
From Longi
INSERT TEXTTypical p-PERC Cell Performance
5 BB5.57 W
• Size : 158.75 x 158.75 mm2
• Eff: 22.1% • Pmax: 5.57 W• ASP: ¥1.01/W
or ¥ 5.63/pc (11/2019)
• Ag consumption (mg): <100
Voc: 681 mVJsc: 40.3 mA/cm2
FF: 80.5%Eff: 22.1%
• LID, LeTID?• > 22.5%?
INSERT TEXTPERC Cell Annual Production
21
21.5
22
22.5
23
23.5
24
0
20
40
60
80
100
120
2014 2015 2016 2017 2018 2019 2020
Ave
. Cel
l Eff
(%
)
Pro
du
ctio
n (
GW
)
Year
Capacity
Production
Ave Cell Eff
INSERT TEXTCell Improvements
19.00
20.00
21.00
22.00
23.00
24.00
25.00
26.00
Passiv
ated R
ear
Low
R W
afer
Select
ive E
mitt
er
Bette
r Pas
ivatio
n
Bette
r Pas
te
High R
Em
itter
mBB
Fab R
&D Best
Lab R
&D B
est
Cel
l Eff
icie
ncy
(%
)
INSERT TEXT
Electricity at $0.0242/kWh1117 MW p-PERC Cell module
Sweihan Project In Abu Dhabi 2016 - 2019
INSERT TEXTStandard Back Surface Field Cell
For p-type c-Si cell
~ 20%
Limited by rear J0
INSERT TEXTThe 25% UNSW PERC Cell
• Inverted pyramid• Selective emitter• Plated fingers• Point contact
Best Efficiency: 25.0%FF: 82.8%Voc: 706 mVJsc: 42.7 mA/cm2
after new AM1.5 standard1999
1989: Passivated Emitter and Rear Cell (PERC)Cell Efficiency: 22.8%
INSERT TEXT
⚫ Higher Voc
⚫ Better IR response
Advantages of PERC Cell
From ISFH
INSERT TEXT
18
19
20
21
22
23
24
25
26
1/2/1
982
1/2/1
986
1/2/1
990
1/2/1
994
1/2/1
998
1/2/2
002
1/2/2
006
1/2/2
010
1/2/2
014
1/2/2
018
1/2/2
022
PERC Cell Performance Review
Bes
t Ef
fici
ency
(%
)
Schott SolarJA Sunrise GlobalTrinaSolar World NSP GintechTongWeiAikoSuminRisenTalesunCSI
UNSW
JinkoLongi/Lerri
Year
Suntech1984, RFP, RB-4-04033, SERI
INSERT TEXTPERC Cell Process in Manufacturing
1. SDR 2. Texturing3. POCl3
diffusion4. Rear side
etching
5. Rear Passivation
layers6. Front SiNx
7. Laser Ablation
8. Screen printing
9. Co-firing, AN &
regeneration
10. JV & sorting
INSERT TEXT
Efficiency % >22
Throughput wph ~ 6000
Capacity MW/line >250
Yield % >98
Cost of cell $/W 0.035
CapEx $m/GW ~ 40
Size < M6, M12
Factory Specs: p-type cell
INSERT TEXTLight Induced Degradation (LID)
Monocrystalline PERC Cell, Before
LID, 20.924
Monocrystalline PERC Cell, After
LID, 19.293
Eff
icie
ncy
(%
)
c-Si PERC Cell
c-Si PERC Cell
Before LID 20.92%
After LID 19.79%
Δ 5.42%
Testing Condition
➢ Illumination intensity at
900-1000W/m 2
➢ Cell temperature at
50-60℃
➢ Light Soaking for
5 hours
INSERT TEXTLeTID
Q-Cell Report
INSERT TEXTRegeneration of Defects
1 – 100 suns
LED/Laser
Heater
Cell
Axel Herguth and Giso Hahn, EU PVSEC 2013)
Carrier injectionPhoton injection
INSERT TEXTFigure Out the Root Cause of LeTID
Alex Herguth, and Brett Hallam, from: 28th Workshop on c-Si solar cells and Modules
INSERT TEXTEvolution of Cell Size and Design
1 cm2 148 cm2 ~ 240 cm24 cm2
Shingle nBBmBB Bifacial1/2
~ 274 cm2
INSERT TEXTCell Size Gets Larger
Unit M2 G1 M6 M12
Diameter mm 211.0 223.0 223.0 304.8
Length mm 156.75 158.75 166.00 210.00
Area cm2 244.31 252.01 274.16 441.00
Change cm2 0.00 7.70 29.85 196.69
Change % 0 3 12 80
Change % 0 9 75
Change % 0 71
D
L
INSERT TEXT2、n-type组件外观Module Trend
2018 2019 2020
400W 500W?>450W
INSERT TEXT
Highway sound barrier Above water
Applications
INSERT TEXTThank youThank You!