A leaf-inspired photon management scheme using optically tuned bilayer nanoparticles for ultra-thin and highly efficient photovoltaic devices

Das, Sonali; Hossain, Mohammad Jobayer; Leung, Siu Fai; Lenox, Anya; Jung, Yeonwoong; Davis, Kristopher O.; He, Jr‐Hau; Roy, Tania

doi:10.1016/j.nanoen.2018.12.072

Cited by 93 publications

(57 citation statements)

References 48 publications

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“…As we all know, it is a well validated fact that the surface nanostructures of the material have a significant effect on its surface properties . Particularly, one‐dimension nanostructure (such as nanowire, nanorod and nanobelt) show a unique surface property, which can been extensively applied in optoelectronic and electronic systems . Furthermore, these properties can highly affect the charge stability of the electrets .…”

Section: Figurementioning

confidence: 99%

“…[12][13][14] Particularly, one-dimension nanostructure (such as nanowire, nanorod and nanobelt) show a unique surface property, which can been extensively applied in optoelectronic and electronic systems. [15][16][17][18][19] Furthermore, these properties can highly affect the charge stability of the electrets. [20][21] Therefore, the charge stability for the electrets might be tailored by its nanostructre.…”

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confidence: 99%

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Charge Distribution and Stability of SiO₂ Nanoarray Electret

Liang

Wang

et al. 2020

ChemNanoMat

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The devices based on SiO 2 electret have significant applications in various MEMS sensors. However, the charge stability of SiO 2 electret suffered from the water percolation, which seriously restricts its application. In this work, the longterm charge stability of the SiO 2 nanoarray electret (SiO 2 NAE) without any water repellent treatment is demonstrated. When the oxidation time is 1.5 h, the potential decay of the SiO 2 NAE is less than 46% during 60 days with an original potential of À 120 V. The long-term charge stability of the SiO 2 NAE is attributed to its unique charge decay process and the large H 2 O diffusion barrier in the SiO 2 NAE: firstly, the charge trapped in the planar part of the SiO 2 NAE decays rapidly. Then, residual charge stored in the SiO 2 nanoarray. Eventually, the large H 2 O diffusion barrier in the interface of Si/SiO 2 effectively hinders the charge decay. In addition, we demonstrate the unique charge stability of nanoelectret, which has a promising application in developing high performance electret-based devices.An electret is a kind of insulator that exhibits a quasi-permanent source of electric field. Due to the trapped electret charges, it has been widely used in MEMS devices such as energy harvester, [1][2] various transducer [3][4][5] and microphones. [6] Among all the electret materials, SiO 2 show the great potential in fabricating high performance MEMS devices because of the high dielectric strength and the compatibility in CMOS processing. However, the trapped Communication

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Section: Figurementioning

confidence: 99%

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confidence: 99%

Charge Distribution and Stability of SiO₂ Nanoarray Electret

Liang

Wang

et al. 2020

ChemNanoMat

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“…Recently, Si hierarchical structures consisting of micropyramids and nanowire arrays have been proposed for significant light harvesting attributed to the combined effect of graded refractive index due to the nanowires and light scattering due to micropyramids . Das et al have demonstrated a substantial enhancement in the photovoltaic characteristics of a graphene/Si schottky junction solar cell by using a leaf‐inspired biomimetic light‐trapping scheme. In this scheme, spheroidal silica and titania nanoparticle bilayers are present on top of the cell surface which confines the incident light into the solar cell through whispering gallery modes supported by silica nanoparticles and subsequent forward scattering into the high index absorber substrate by titania nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Indium‐rich InGaN/GaN solar cells with improved performance due to plasmonic and dielectric nanogratings

Kumawat

Kumar

Bhardwaj

et al. 2019

Energy Science & Engineering

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In this study, we propose an indium‐rich InGaN/GaN p‐i‐n thin‐film solar cell which incorporates a dual nanograting (NG) structure: Ag nanogratings (Ag‐NGs) on the backside of the solar cell and gallium nitride nanogratings (GaN‐NGs) on the frontside. Finite‐difference time‐domain (FDTD) simulation results show that the dual NG structure couples the incident sunlight to the plasmonic and photonic modes, thereby increasing the absorption of the solar cell in a broad spectral range. It is observed that the solar cells having the dual nanograting structures have a significant enhancement in light absorption as compared to cells having either no nanogratings or having only the frontside nanogratings or only the backside nanogratings. Analysis of light absorption in solar cells containing the dual NG structures showed that the absorption enhancement of longer wavelengths is mostly due to the Ag‐NGs on the backside and of shorter wavelengths is mostly due to the GaN‐NGs on frontside of the solar cell. The Jsc and power conversion efficiency (PCE) are calculated under AM1.5G solar illumination and are observed to be significantly enhanced due to the presence of optimized dual NG structures. While there is an increase in Jsc from 17.88 to 23.19 mA/cm2 (~30% enhancement), there is an increase in PCE from 15.49% to 20.24% (~31% enhancement) under unpolarized light (average of TM and TE). Moreover, the study of oblique light incidence shows significantly larger Jsc of the dual nanograting solar cells compared to the cells with no nanogratings.

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“…There have been some investigations carried out concerning the relevance of multiscale/hierarchical designing in photonics and optoelectronics. These include using hierarchically patterned photovoltaic architectures to boost photocurrents beyond the limits of a single‐level pattern, design of fractal‐like nanostructures for multimodal plasmonic resonance to broaden spectral response, hybrid nanostructures for efficient photodetectors, and energy harvesters for self‐powered nanostructured photodetectors . Particularly, the design advantages of hierarchically structured electrodes have been demonstrated in the area of dye‐sensitized solar cells.…”

Section: Introductionmentioning

confidence: 99%

Shaping Resonant Light Confinement and Optoelectronic Spectra Using Strain in Hierarchical Multiscale Structures

Jagdish

Panidhara

Satyanarayana

et al. 2019

Advanced Optical Materials

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Hierarchically structured optical materials have been a topic of intriguing research interest due to the possibility of tailoring material properties beyond the limits of bulk continuum material design. Here, an optical confinement phenomenon in a hierarchically structured waveguide platform consisting of alternating clusters of nanostructured and planar microscale domains is demonstrated. An unconventional self‐assembly‐based strain‐assisted nanomolding process is developed to fabricate these hierarchically structured multiperiodic waveguides. Further, these hierarchically patterned waveguides are used as substrates for solution‐processed photodetectors. The optical confinement occurring due to the nanoscale scattering and the wavelength‐dependent interaction between the planar and structured microdomains leads to an improved uniformity in the optoelectronic spectral response of these photodetectors. Furthermore, by tuning the multiperiodicity within the nanostructured domain structure, using a mechanical strain of 20%, an improvement of around 10% in the uniformity of the optoelectronic spectral response of the photodetectors is demonstrated. Simulations further show that these processes arise only in the presence of a hierarchical structure, due to multiscale interaction, through wavelength‐selective coupling of scattered light from nanostructured domains to the planar microdomains. In summary, hierarchical structures can address optoelectronic problems that cannot be addressed by simpler structures.

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A leaf-inspired photon management scheme using optically tuned bilayer nanoparticles for ultra-thin and highly efficient photovoltaic devices

Cited by 93 publications

References 48 publications

Charge Distribution and Stability of SiO₂ Nanoarray Electret

Charge Distribution and Stability of SiO₂ Nanoarray Electret

Indium‐rich InGaN/GaN solar cells with improved performance due to plasmonic and dielectric nanogratings

Shaping Resonant Light Confinement and Optoelectronic Spectra Using Strain in Hierarchical Multiscale Structures

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A leaf-inspired photon management scheme using optically tuned bilayer nanoparticles for ultra-thin and highly efficient photovoltaic devices

Cited by 93 publications

References 48 publications

Charge Distribution and Stability of SiO2 Nanoarray Electret

Charge Distribution and Stability of SiO2 Nanoarray Electret

Indium‐rich InGaN/GaN solar cells with improved performance due to plasmonic and dielectric nanogratings

Shaping Resonant Light Confinement and Optoelectronic Spectra Using Strain in Hierarchical Multiscale Structures

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Charge Distribution and Stability of SiO₂ Nanoarray Electret

Charge Distribution and Stability of SiO₂ Nanoarray Electret