Correlating the nanoparticle size dependent refractive index of ZnO optical spacer layer and the efficiency of hybrid solar cell through optical modelling

Vincent, Premkumar; Kim, Do Kyung; Kwon, Jin-Hyuk; Bae, Ji‐Hoon; Kim, Hyeok

doi:10.1016/j.tsf.2018.06.004

Cited by 13 publications

(15 citation statements)

References 20 publications

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“…Onwudiwe et al [49] and Rehman et al [50] both reported ε r ' around 3.5 in the MHz and GHz ranges for ZnO nano-and microspheres, respectively, which is close to the value we infer from the pressed pellets. Measurements of particles well outside our frequency range exist [51] though comparisons with our work may have limited meaning.…”

Section: Terahertz Characterizationmentioning

confidence: 83%

Optical constants of CuO and ZnO particles in the terahertz frequency range

Rosa

Locquet

Bouscaud

et al. 2020

Ceramics International

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The optical constants (complex dielectric function) of isotropically distributed CuO and ZnO particles in polyethylene pellets are measured by terahertz time-domain spectroscopy. The determination of the dielectric properties of these materials is of interest for energy-storage applications. Maxwell-Garnett theory is used to extract the contribution to the frequency-dependent optical constants of the oxide powders. The validity of the assumptions of Maxwell-Garnett theory are experimentally verified and self-consistency of the results of the model confirmed. On this basis, experimental complex permittivity values for isotropic CuO and ZnO oxide powders are reported in the 100 GHz-3 THz range.

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Section: Terahertz Characterizationmentioning

confidence: 83%

Optical constants of CuO and ZnO particles in the terahertz frequency range

Rosa

Locquet

Bouscaud

et al. 2020

Ceramics International

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“…Researchers commonly use metal oxides, such as ZnO or TiO 2 , as an ETL in IPSCs. [ 13–15 ] Among these metal oxides, ZnO has very high transmission, superior electrical transportability, better environmental stability, good hole blocking properties, and low cost. [ 16 ] Various metal‐doped n ‐type semiconductors have recently been used as a buffer layers (ETL) to improve the charge transport properties of IPSCs; however, they used semiconductors doped with single metals, such as aluminum (Al)‐doped zinc oxide, gallium (Ga)‐doped zinc oxide, tin (Sn)‐doped zinc oxide, indium (In)‐doped zinc oxide, and niobium (Nb)‐doped zinc oxide (NZO).…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Inverted Polymer Solar Cells Using an Indium Gallium Zinc Oxide Interfacial Layer

et al. 2021

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Organic polymer semiconductor‐based polymer solar cells (PSCs) are drawing tremendous research interest for their superior electrical, structural, optical, mechanical, and chemical properties. During the last two decades, immense efforts have been made toward the development of PSCs. Generally, poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is used as hole transport layer (HTL) of PSCs to improve hole extraction efficiency, but highly acidic PEDOT:PSS reduces device lifetime by destroying indium tin oxide (ITO) electrodes and active layers. To avoid this, some have attempted to develop inverted structured PSCs with different electron transport layers (ETLs); however, the power conversion efficiency (PCE) of these devices is limited owing to low electron mobility of their ETLs. Therefore, an attempt is made to improve the PCE of an inverted‐structured PSC by using indium gallium zinc oxide (IGZO) with optimized amount of indium (In), gallium (Ga), and zinc (Zn). Inverted PSCs with ZnO or IGZO (having various molar ratios of In, Ga, and Zn) as ETL with the structure ITO/ETL/PTB7:PC71BM/MoO3/Al are constructed. The PCE of the inverted PSC can be increased from 6.22% to 8.72% by using IGZO with an optimized weight ratio of In, Ga, and Zn as an ETL.

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“…Recently, a few studies tried to assess the effects of different operation parameters on indoor OPVs and their operational mechanism through optical modulation via finite difference time-domain (FDTD)-based simulation. [49,62,63,82,[85][86][87][88][89][90][91][92] The optical simulation enables one to find concentrated intensity of light within the active layer, and optimize light absorption by using diverse combinations of common layers and electrodes in different conventional and inverted configurations. Such calculation has led to rationally designed high-performance photovoltaics in experiments.…”

Section: Optical Simulationmentioning

confidence: 99%

Indoor Organic Photovoltaics: Optimal Cell Design Principles with Synergistic Parasitic Resistance and Optical Modulation Effect

Saeed

Kim

et al. 2021

Advanced Energy Materials

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Recently, the growing popularity of indoor electronic devices has led to considerable attention on ambient energy harvesting systems. In particular, the incorporation of electronic products that harness the Internet of Things (IoT) services has spurred interest in semipermanent indoor power generation systems, owing to their numerous sensor nodes. [1][2][3][4][5] Ambient energies such as light and heat and the conversion systems to turn them into electricity have been vigorously investigated for practical applications. Among them, indoor light energy and photovoltaic (PV) systems have shown potential for harvesting ambient energy, considering the high accessibility of the pertinent energy sources as well as the excellent power conversion capabilities of the PV system. [6][7][8][9][10][11][12] PV systems could incorporate different types of light-absorbing materials such as silicon, gallium arsenide, and organics. Organic photovoltaics (OPVs) is most suited for indoor energy harvesters, since their unique optical properties (such as high absorption coefficient and bandgap tunability) and other features (such as superior mechanical flexibility and diverse color options) could well match the indoor light conditions/environments characterized by low light intensity, varying output spectra, and aesthetic considerations. [13][14][15][16][17][18][19] Many studies tried to enhance the performance of OPVs under altered light conditions as opposed to outdoor conditions (1 sun) (more in detail will be discussed later). [20][21][22][23][24] As a result, substantial progress has been made, with the power conversion efficiency (PCE) up to 28% [25] with a 1000 lx fluorescent (FL) lamp and 30.8% with a 1650 lx light emitting diode (LED). [4] These PCE values correspond to ≈160 µW cm −2 in output power density, which is large enough to operate certain indoor electronic devices such as smoke detectors (6 µW) and occupation motion detectors (28 µW). However, these values are far below the theoretical limits of 45.7% for the FL lamp and 58.4% for the LED. [26] Thus, there remains significant room for improvement.Compared to 1 sun illumination commonly considered for outdoor PVs, the indoor environment is characterized by much lower light intensities and completely different output spectra. Therefore, realization of efficient OPVs under indoor Recently, indoor organic photovoltaics (OPVs) has attracted substantial research attention, due to the emergence of self-powered electronic devices for Internet-of-Things (IoT) applications. This progress report discusses recent developments in indoor OPVs, focusing on the strategic role of synergistic parasitic resistance in suppressing the leakage current to achieve high indoor efficiencies. Moreover, an underexplored area is presented, namely the impact of optical modulation on enhancing light absorption in indoor OPVs. First, the main advances in material design for indoor OPVs are briefly presented. This is followed by detailed discussions of the crucial strategies, including interfacial e...

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Correlating the nanoparticle size dependent refractive index of ZnO optical spacer layer and the efficiency of hybrid solar cell through optical modelling

Cited by 13 publications

References 20 publications

Optical constants of CuO and ZnO particles in the terahertz frequency range

Optical constants of CuO and ZnO particles in the terahertz frequency range

Highly Efficient Inverted Polymer Solar Cells Using an Indium Gallium Zinc Oxide Interfacial Layer

Indoor Organic Photovoltaics: Optimal Cell Design Principles with Synergistic Parasitic Resistance and Optical Modulation Effect

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