Characterization of Thin Films for Solar Cells and Photodetectors and Possibilities for Improvement of Solar Cells Characteristics

Vasić, A.; Vujisić, Miloš; Stanković, Koviljka; Osmokrović, P.

doi:10.5772/23157

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…Estimation of ideality factor from the I-V characteristics is an effective way to evaluate the possible degradation of output characteristics of photo detectors. 21 The value of ideality factor reflects the contribution from different current transport mechanisms to the total diode current. According to the Shockley diode theory, the diffusion current has an ideality factor of 1.…”

Section: Capacitance-voltage Characteristics (C-vmentioning

confidence: 99%

“…The electrons scattered by photons which are called secondary electrons does not have sufficient energy to produce further displacement damage and hence introduction of divacancy states is restricted and most defects are of the vacancy-impurity type distributed uniformly throughout the bulk silicon. 21,24 Hence the radiation damage introduced by gamma photons is predominantly due to point defects. 25,26 The density of these defects increase along with the incremental dose which affects the values of leakage current and dopant concentration.…”

Section: Capacitance-voltage Characteristics (C-vmentioning

confidence: 99%

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Influence of High Dose Gamma Irradiation on Electrical Characteristics of Si Photo Detectors

Kumar¹,

Kumar²,

Cheng³

et al. 2017

ECS J. Solid State Sci. Technol.

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The radiation response of Si photo detectors has been studied through Current voltage (I-V) and Capacitance Voltage (C-V) measurements for accumulated high doses of Co-60 gamma rays in the wide range of 1 Mrad to 100 Mrad. The key electrical parameters such as ideality factor (n), series resistance (RS) and reverse leakage current (IR) has been extracted from I-V characteristics. The acceptor concentration (NA) was extracted from C-V characteristics. The detectors exhibited degradation in the values of electrical parameters up to 60 Mrad, further at higher doses improvement in their values is noticed. The lattice defects introduced by gamma rays may have significantly contributed to the deterioration of device parameters at initial doses, whereas the partial recovery at higher does is attributed to annealing effect of gamma rays due to its electronic energy loss (Se) component.

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Section: Capacitance-voltage Characteristics (C-vmentioning

confidence: 99%

Section: Capacitance-voltage Characteristics (C-vmentioning

confidence: 99%

Influence of High Dose Gamma Irradiation on Electrical Characteristics of Si Photo Detectors

Kumar¹,

Kumar²,

Cheng³

et al. 2017

ECS J. Solid State Sci. Technol.

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“…Cu 2 O is a promising candidate for photovoltaic applications as a possible solution to the global energy crisis [1,4], providing alternative, safe, and sustainable energy sources [3]. Examples of this are the conversion of solar energy into electrical energy [5][6][7] and the generation of hydrogen from the photoelectrochemical conversion of the sun [3,8].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Structural and Optical Properties of Cuprous Oxide Particles for Visible Light Absorption

Carrasco-Hernández

Ontiveros

Martínez‐Guerra

et al. 2022

Journal of Nanomaterials

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Absorbent materials are being developed to replace semiconductor materials such as p-type silicon, GaAs, CdTe, and quaternary compounds such as CIGS (copper indium gallium selenide). Cu2O is a potential candidate because it is non-toxic, inexpensive, an abundant compound in the Earth’s crust, and has good optical properties, such as a high absorption coefficient. In this work, Cu2O was obtained simply by reducing Benedict’s solution with glucose in an alkaline medium (pH 10.2 ± 0.2) at 65°C. The samples were synthesized by varying glucose content from 1 g to 7 g. The results showed a phase proportion variation between 95.56% and 99.50% of the Cu2O phase. It was found that the changes in crystallite size, microstrains, particle size, and morphology are due to reaction times, which were influenced by the use of different glucose amounts. The use of a higher glucose amount in the synthesis favors a faster reaction, forming smaller crystallites with more microstrains. Lower glucose amount leads to a slower reaction giving the crystallites more time to grow, which relaxes the microstrains. When increasing glucose content, the obtained morphologies changed from cubes, irregular cubes, prismatic spheres, cauliflower-like, to spherical shapes. The XPS spectra confirmed only the presence of chemical species such as Cu(I) and Cu(II), and chemical defects, such as oxygen vacancies (Vo), were detected in the samples. All samples presented a broad absorption range from 200 nm to 570 nm indistinctly of the morphology. The band gap showed an insignificant change from 2.04 eV to 2.09 eV when glucose was increased from 1 g to 7 g. The in-situ phase transformation study was analyzed from 25°C to 700°C. The results indicated a phase transition from Cu2O to Cu and CuO when the temperature was above 280°C.

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“…An alarming trend of increasing energy needs, coupled with deteriorating the stock conventional energy sources like fossil fuels, has forced scientists to look for clean and abundant renewable energy sources. Renewable energy resources play an important role for power generation in the recent years [1]. Solar energy is one of the most environment friendly power sources available abundantly in the world at no cost.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effects of homogeneous and heterogeneous solar irradiations on multicrystal PV module under various configurations

Vengatesh¹,

Rajan²

2015

IET Renewable Power Generation

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This research work investigates the power-voltage (P-V) and current-voltage (I-V) characteristics of multicrystal photovoltaic (PV) module, connected in series, parallel and series-parallel configurations. The modular characteristics of PV module have been performed under homogeneous and heterogeneous conditions. The experimental and simulation results indicate that for a given number of PV modules, the array configurations affect the maximum available output power and more local maxima are found under partially shaded conditions. The analysis of bypass diodes effect has been carried out under partial shadings on the PV module strings. The obtained results reveal that, the presence of bypass diodes allow the unshaded modules of all the series assemblies to conduct their maximum currents at a given solar radiation and temperature. Moreover, the comparative analysis of PV module has been carried out for different configurations under the above disturbances. Maximum output power is obtained, when PV modules are configured parallelly, even under shading conditions. The specifications of the PV module have been obtained from the manufacturer datasheet (KC200GT) for these investigations.

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Characterization of Thin Films for Solar Cells and Photodetectors and Possibilities for Improvement of Solar Cells Characteristics

Cited by 6 publications

References 15 publications

Influence of High Dose Gamma Irradiation on Electrical Characteristics of Si Photo Detectors

Influence of High Dose Gamma Irradiation on Electrical Characteristics of Si Photo Detectors

Evolution of Structural and Optical Properties of Cuprous Oxide Particles for Visible Light Absorption

Investigation of the effects of homogeneous and heterogeneous solar irradiations on multicrystal PV module under various configurations

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