TY - JOUR

T1 - High-efficiency cells from layer transfer

T2 - A first step toward thin-film/wafer hybrid silicon technologies

AU - Brendel, Rolf

AU - Petermann, Jan Hendrik

AU - Zielke, Dimitri

AU - Schulte-Huxel, Henning

AU - Kessler, Michael

AU - Gatz, Sebastian

AU - Eidelloth, Stefan

AU - Bock, Robert

AU - Garralaga Rojas, Enrique

AU - Schmidt, Jan

AU - Dullweber, Thorsten

N1 - Funding Information: Manuscript received July 6, 2011; revised August 9, 2011 and August 12, 2011; accepted August 12, 2011. Date of publication September 15, 2011; date of current version October 27, 2011. This work was supported in part by the German Federal Ministry for the Environment, Nature Conservation, and Nuclear Safety in the framework of the CrystalLine project under Contract 0325192.

PY - 2011

Y1 - 2011

N2 - Future low-cost Si photovoltaics shall combine the high-efficiency potential of ultrathin monocrystalline Si films with the low cost per area of the Si-thin-film photovoltaics. The literature describes various techniques for fabricating ultrathin monocrystalline Si films with no need for sawing wafers. Layer transfer using epitaxy on porous Si and subsequent layer separation is one option. We demonstrate an independently confirmed aperture efficiency of 19.1 for a 4-cm 2-sized layer transfer cell with a thickness of 43μm. This cell has a passivated emitter and rear contact structure with an Al 2O 3-surface passivation by atomic layer deposition and lasered contact openings. Highly efficient thin crystalline solar cells have to be integrated into modules. We also report on laser bonding of Si cells to a metalized carrier for module integration.

AB - Future low-cost Si photovoltaics shall combine the high-efficiency potential of ultrathin monocrystalline Si films with the low cost per area of the Si-thin-film photovoltaics. The literature describes various techniques for fabricating ultrathin monocrystalline Si films with no need for sawing wafers. Layer transfer using epitaxy on porous Si and subsequent layer separation is one option. We demonstrate an independently confirmed aperture efficiency of 19.1 for a 4-cm 2-sized layer transfer cell with a thickness of 43μm. This cell has a passivated emitter and rear contact structure with an Al 2O 3-surface passivation by atomic layer deposition and lasered contact openings. Highly efficient thin crystalline solar cells have to be integrated into modules. We also report on laser bonding of Si cells to a metalized carrier for module integration.

KW - Aluminum oxide passivation

KW - laser bonding

KW - layer transfer

KW - thin film/wafer hybrid

UR - http://www.scopus.com/inward/record.url?scp=84865171078&partnerID=8YFLogxK

U2 - 10.1109/JPHOTOV.2011.2165529

DO - 10.1109/JPHOTOV.2011.2165529

M3 - Article

AN - SCOPUS:84865171078

VL - 1

SP - 9

EP - 15

JO - IEEE journal of photovoltaics

JF - IEEE journal of photovoltaics

SN - 2156-3381

IS - 1

M1 - 6018975

ER -