PV Modules: Bifacial technology
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Introduction
Module Bifaciality
Pmpp back
Module Bifaciality =
Pmpp front
tecnalia
Inspiring
Business
Module bifaciality is strongly related with module technology:
PERC: Most common. Monofacial manufacturing lines easy to transform to bifacial. Lower bifaciality (70-80%). Usually p-type cells. Probably the cheapest
bifacial option.
PERT: Quite common but less than PERC. Manufacturing lines transformation more complex than PERC, but still relatively easy. Good bifaciality (80-90%).
Usually n-type cells. Relatively cheap but more expensive than PERC.
HJT/SHJ: High efficiency, high bifaciality (about 95%). Cell fabrication is very different from that of homojunction c-Si cells. Low temperature coefficient
(<0.3% /ºC). Normally more expensive than PERC/PERT.
IBC: promising option to obtain high-efficiency solar cells. The contacts are solely on the rear side of the solar cell. This approach requires other fabrication
procedures. Still in its infancy.
Cell concept
Bifaciality factor Si base material Junction and BSF
doping method
Contacts
Heterojunction
>0.95
n-mono
a-Si:H p-and
n-type doped
TCO/Ag
(Front)
Efficiency
potential
22-25%
Industry
TCO/Cu plated
PERT
>0.90
n-mono
p-mono
B and P tube diffusion
Ag and Ag/Al
printed
21-23%
3Sun, Hanergy, Hevel, Jinergy,
Panasonic, Sunpreme, etc.
Adani, Jinko, Jolywood, LG,
Linyang, REC, Trina, Yingli, etc.
p-multi
n-doped poly-Si rear
side possible
PERC+
>70%
p-mono
p-multi
B and P tube diffusion, Ag and Al printed
local AI BSF
21-23%
Eging, JA Solar, Jinko, Longi,
NSP, SolarWorld, Trina, etc.
n-mono
IBC
>70%
n-mono
B and P tube diffusion
Ag and Ag/Al
22-25%
Valoe
State-of-the-art bifacial module technology.
printed
PVTech September 2018
APCVD doped oxides
GoPV Project | 1st TRAINING COURSES
TECHNICAL FOCUS ON FUTURE SOLAR PV SYSTEMS
October 26-29th 2020View entire presentation