Numerical Study of Complementary Nanostructures for Light Trapping in Colloidal Quantum Dot Solar Cells.
We have investigated two complementary nanostructures, nanocavity and nanopillar arrays, for light absorption enhancement in depleted heterojunction colloidal quantum dot (CQD) solar cells. A facile complementary fabrication process is demonstrated for patterning these nanostructures over the large area required for light trapping in photovoltaic devices. The simulation results show that both proposed periodic nanostructures can effectively increase the light absorption in CQD layer of the solar cell throughout the near-infrared region where CQD solar cells typically exhibit weak light absorption. The complementary fabrication process for implementation of these nanostructures can pave the way for large-area, inexpensive light trapping implementation in nanostructured solar cells.
Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4, Canada. weijue@hotmail.com.|Key Laboratory of Coherent Light and Atomic and Molecular Spectroscopy of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China. weijue@hotmail.com.
Jue
J
Wei
Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4, Canada. qiuyang@ualberta.ca.
Qiuyang
Q
Xiong
Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4, Canada. mahpeyka@ualberta.ca.
Seyed Milad
SM
Mahpeykar
Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4, Canada. xihua@ualberta.ca.
Xihua
X
Wang
light trapping; nanostructures; solar cells