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Updated: Jan 8, 2026
Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
Published on: July 18, 2015
Generación ultrarrápida de fotovoltaje con gradiente lateral >5700 V cm-1 habilitada por una estructura asimétrica de
Cailing Ou1, Baichuan Jiang1, Wenbin Li1
1State Key Laboratory of Coordination Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
Abstract:
The strategic design of periodic microstructures composing diverse components with contrasting physical properties unlocks emerging material functionalities. Here, a laterally polar nanograting surface, fabricated through scalable nanoimprint lithography and self-aligned multi-patterning, featuring asymmetrically connected photovoltaic-active units with submicron periodicity, is presented. This asymmetric nanograting structure is enabled by upright, fin-like nano-walls that serve both as structural templates and conductive interconnects, allowing for the selective deposition of donor-acceptor heterojunctions to optimize photovoltaic efficiency while minimizing inactive areas. After deliberate optimization, such as transitioning from a spin-coated donor-acceptor bulk heterojunction to a vacuum-deposited bilayer one, the design achieves unprecedented photovoltage output, with peak values exceeding 5700 V cm-1 in the best-performing architecture. This remarkably high-voltage output opens avenues for applications in micro-optoelectromechanical systems, facilitating in-chip powering of functional dielectrics and ultra-light electrostatic engines.
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