Deterministic quasi-random nanostructures for photon control
Emiliano R. Martins,Juntao Li,Yikun Liu,Valerie Depauw,Zhanxu Chen,Jianying Zhou,Thomas F. Krauss,Thomas F. Krauss +7 more
TLDR
A novel approach for designing richer Fourier spectra is introduced, by using a periodic structure that allows us to control its Fourier components almost at will, and it is shown how these structures can be employed to achieve highly efficient broad-band light trapping in thin films that approach the theoretical limit.Abstract:
Controlling the flux of photons is crucial in many areas of science and technology. Artificial materials with nano-scale modulation of the refractive index, such as photonic crystals, are able to exercise such control and have opened exciting new possibilities for light manipulation. An interesting alternative to such periodic structures is the class of materials known as quasi-crystals, which offer unique advantages such as richer Fourier spectra. Here we introduce a novel approach for designing such richer Fourier spectra, by using a periodic structure that allows us to control its Fourier components almost at will. Our approach is based on binary gratings, which makes the structures easy to replicate and to tailor towards specific applications. As an example, we show how these structures can be employed to achieve highly efficient broad-band light trapping in thin films that approach the theoretical (Lambertian) limit, a problem of crucial importance for photovoltaics.read more
Citations
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Silicon nanostructures for photonics and photovoltaics
TL;DR: Focusing on two application areas, namely communications and photovoltaics, the state of the art in each field is assessed and the challenges that need to be overcome are highlighted to make silicon a truly high-performing photonic material.
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Silicon solar cells: toward the efficiency limits
TL;DR: The photovoltaic conversion of solar energy starts to give an appreciable contribution to power generation in many countries, with more than 90% of the global PV market relying on solar cells base.
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High-Efficiency Perovskite Light-Emitting Diodes with Synergetic Outcoupling Enhancement.
TL;DR: A facile route is demonstrated by adopting bioinspired moth-eye nanostructures at the front electrode/perovskite interface to enhance the outcoupling efficiency of waveguided light in PeLEDs, and the maximum external quantum efficiency and current efficiency of the modified cesium lead bromide green-emitting Pe LEDs are improved.
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15.7% Efficient 10-μm-Thick Crystalline Silicon Solar Cells Using Periodic Nanostructures
Matthew S. Branham,Wei-Chun Hsu,Selcuk Yerci,Selcuk Yerci,James Loomis,Svetlana V. Boriskina,Brittany R. Hoard,Sang Eon Han,Gang Chen +8 more
TL;DR: In this article, a light-trapping design incorporating a 2D inverted pyramid photonic crystal and a rear dielectric/reflector stack was proposed to achieve a short-circuit current of 34.5 mA cm−2 and power conversion efficiency of 15.7%.
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Extremely Efficient White Organic Light-Emitting Diodes for General Lighting
Qingdong Ou,Lei Zhou,Yan-Qing Li,Su Shen,Jing-De Chen,Chi Li,Qian-Kun Wang,Shuit-Tong Lee,Jian-Xin Tang +8 more
TL;DR: In this paper, an efficient white organic light-emitting diodes (OLEDs) were shown that combines deterministic aperiodic nanostructures for broadband quasi-omnidirectional light extraction and a multilayer energy cascade structure for energy-efficient photon generation.
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Erik C. Garnett,Peidong Yang +1 more
TL;DR: It is demonstrated that ordered arrays of silicon nanowires increase the path length of incident solar radiation by up to a factor of 73, which is above the randomized scattering (Lambertian) limit and is superior to other light-trapping methods.