Semiconductor Physics Research Laboratory



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Seimconductor Physics Research Laboratory

Department of Physics, Chulalongkorn University

Bangkok, THAILAND

About us

Semiconductor Physics Research Laboratory (SPRL) is part of the Department of Physics. Our main interests are in the fields of growth, characterization as well as analysis of semiconductor materials, specifically the fabrication of photovoltaic devices or solar cells. We are currently working on processes for fabrication of thin-film solar cells, particularly, Cu(In,Ga)Se2 (CIGS) and related compounds. At present, CIGS thin-film solar cells with 15 % efficiency have been achieved at the SPRL. The related material fabrication technology to produce these cells including ZnO, ITO, CdS and Mo are completely in house. In addition, for an academic aspect, an effort to make high quality films of CuInSe2, CuGaSe2 and their alloys using molecular beam epitaxy technique are being pursued for studying its fundamental physics.

Update on efficiency of solar modules (Ref. NREL, USA)

SPEC-SHEET RATINGS
From Manufacturers’ Websites
Compiled by Bolko von Roedern
June 2007

Ranked Module Efficiency (%)	Description of best module	Same module with lowest power rating
17.7	SunPower SPR220 (SunPower rear-point contacted cells, single crystal FZ) Tcoeff = -0.38 %/C, Voc/cell = 671mV	Also SPR 200, efficiency 16.3%
17.0	Sanyo HIP-200BE3 (single crystal CZ Si, HIT Tcoeff = -0.30 %/C, Voc/cell = 716 mV)	Also HIP-180B3, efficiency 15.3%
15.1	BP7190 (single crystal laser grooved buried grid cells, CZ-Si, Spain) Tcoeff= -(0.5±0.05) %/C, Voc/cell = 622 mV	Also BP 7170, efficiency 13.5%
14.2	Kyocera KC200GT (cast multi-Si diffused cells) Tcoeff.(only given for Voc, -0.123 V/C), Voc/cell = 609 mV	Only one rating listed
14.2	Solar World AG SW 185 (mono-Si “Shell”) Tcoeff.: VOC= -0.35V/C, Voc/cell = 622 mV	Also WS 160, efficiency 12.3%
13.9	BP175B ("Solarex" multi-Si diffused Cells) Tcoeff= -(0.5±0.05) %/C, Voc/cell = 614 mV	Also BP 3160, efficiency 12.7%
13.8	Sharp NT-180-U1 (mono-Si, diffused) no Tcoeff given, Voc/cell = 622 mV	Only one rating listed
13.7	Advent Solar Advent 180 (emitter wrap thru multi-Si) Tcoeff= -0.48%/C, Voc/cell = 599 mV	Also Advent 160, efficiency 12.2%
13.7	GE GEPVp-200-M (multi-Si) Tcoeff= -0.5%/C, Voc/cell = 609 mV	Also GEPVp 185-M, efficiency 12.7%
13.4	SunTech STP 260-24V/b (cast multi-Si diffused cells) Voc/cell = 608 mV	Same module with mono-Si cells is 260 W
13.4	Solar World AG SW 225 (multi-Si) Tcoeff.: VOC= -0.33V/C, Voc/cell = 613 mV	Also SW 200, efficiency 11.9%
12.8	Sharp ND-208-U1 (mono-Si, diffused) no Tcoeff given, Voc/cell = 605 mV	Also SW 200, efficiency 11.9%
12.7	Evergreen Solar ES 190-RL (string ribbon Si) Tcoeff= -0.51%/C, Voc/cell = 607 mV	Also ES-170-RL, efficiency 11.4%
11.0	WürthSolar WS11007/80 (CIS) Tcoeff.= -0.36 %/C	Also WS 11007/75, efficiency 10.3% (20-year warranty)
9.4	First Solar FS-267 (CdTe) Tcoeff= -0.25 %/C	Also FS-260, efficiency 8.3% (25-year warranty)
8.5	Sharp NA-901-WP (90-W) (amorphous/nanocrystalline Si tandem)	Only one rating listed but ±10% power spec
8.1	GSE Soar GSE 120-W (CIGS) Tcoeff.= -0.5 %/C	Only one rating but ±5% power spec
6.3	Mitsubishi Heavy MA100 T2 (single j. a-Si, VHF deposition) Tcoeff.= -0.2 %/C	Only one rating (20-year warranty)
6.3	Uni-Solar PVL 136 (triple-j. amorphous silicon), Tcoeff = -0.26%	Only one rating (20-year warranty)
6.3	Kaneka T-SC(EC)-120 (single-j. a-Si) No Tcoeff. given	Only one rating (25-year warranty)
5.3	Schott Solar ASI-F 32/12 (same-bandgap double junction a-Si) Tcoeff = - 0.20%/C	Only one rating (20-year warranty)
5.3	EPV EPV-42(same-bandgap double junction a-Si) Tcoeff = - 0.19%/C	Also as EPV-40, eff = 5.1% (20-year warranty)
4.9	Soltech PVS 60-24(single-j amorphous Si)