Demonstration of enhanced absorption in thin film Si solar cells with textured photonic crystal back reflector

L. Zeng, P. Bermel, Y. Yi, B. A. Alamariu, K. A. Broderick, J. Liu, C. Hong, X. Duan, J. Joannopoulos, L. C. Kimerling

doi:10.1063/1.3039787

Demonstration of enhanced absorption in thin film Si solar cells with textured photonic crystal back reflector

DOI PDF 被引用文献4件

L. Zeng

Massachusetts Institute of Technology 1 Department of Materials Science and Engineering, , Cambridge, Massachusetts 02139, USA
P. Bermel

Massachusetts Institute of Technology 2 Department of Physics, , Cambridge, Massachusetts 02139, USA
Y. Yi

Massachusetts Institute of Technology 1 Department of Materials Science and Engineering, , Cambridge, Massachusetts 02139, USA
B. A. Alamariu

Massachusetts Institute of Technology 3 Microsystems Technology Laboratories, , Cambridge, Massachusetts 02139, USA
K. A. Broderick

Massachusetts Institute of Technology 3 Microsystems Technology Laboratories, , Cambridge, Massachusetts 02139, USA
J. Liu

Massachusetts Institute of Technology 1 Department of Materials Science and Engineering, , Cambridge, Massachusetts 02139, USA
C. Hong

Massachusetts Institute of Technology 1 Department of Materials Science and Engineering, , Cambridge, Massachusetts 02139, USA
X. Duan

Massachusetts Institute of Technology 1 Department of Materials Science and Engineering, , Cambridge, Massachusetts 02139, USA
J. Joannopoulos

Massachusetts Institute of Technology 2 Department of Physics, , Cambridge, Massachusetts 02139, USA
L. C. Kimerling

Massachusetts Institute of Technology 1 Department of Materials Science and Engineering, , Cambridge, Massachusetts 02139, USA

説明

<jats:p>Herein the authors report the experimental application of a powerful light trapping scheme, the textured photonic crystal (TPC) backside reflector, to thin film Si solar cells. TPC combines a one-dimensional photonic crystal as a distributed Bragg reflector with a diffraction grating. Light absorption is strongly enhanced by high reflectivity and large angle diffraction, as designed with scattering matrix analysis. 5 μm thick monocrystalline thin film Si solar cells integrated with TPC were fabricated through an active layer transfer technique. Measured short circuit current density Jsc was increased by 19%, compared to a theoretical prediction of 28%.</jats:p>