scholarly journals Investigation of Electrical and Photovoltaic Properties of Au/n-Si Schottky diode with BOD-Z-EN Interlayer

2021 ◽  
Author(s):  
Ali Osman Tezcan ◽  
Serkan Eymur ◽  
Enis Taşcı ◽  
Mustafa Emrullahoğlu ◽  
Nihat Tuğluoğlu
Keyword(s):  
Fill Factor ◽  
Series Resistance ◽  
Short Circuit ◽  
Forward Bias ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Organic Layer ◽  
Photovoltaic Properties ◽  
Current Voltage ◽  
Device Properties

Abstract 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) based BOD-Z-EN compound was used as an interfacial organic layer to fabrication of Au/BOD-Z-EN/n-Si/In diode. The electrical parameters of Au/BOD-Z-EN/n-Si/In diode such as ideality factor (n), barrier height (ΦB) and series resistance (Rs) have been investigated through current-voltage (I-V) studies at dark and under various illumination intensities to understand the effect of interlayer on the device properties. The values found for the n varied from 2.33 to 1.55 and the ΦB ranged from 0.86 eV to 0.90 eV as the illumination condition changed from dark to 100 mW/cm2. Series resistance (Rs) values calculated using Cheung’s method were found to decrease with increasing illumination level. ໿The forward bias I-V characteristics of the diode were explained by the space charge limited current (SCLC) theory. The main photovoltaic parameters such as open circuit voltage (Voc), short circuit current (Jsc) and fill factor (FF) were determined for various light intensity. The Au/BOD-Z-EN/n-Si/In diode exhibits a photovoltaic behavior with a Voc of 0.15 V and Jsc of 0.01 mA/cm2 under 100 mw/cm2. Also, photosensitivity and photoresponsivity properties of the diode were determined. These all results indicate that Au/BOD-Z-EN/n-Si/In device can be used as photosensor in optoelectronic applications.

Novel Linear and Hyperbranched Polythiophene Derivatives Containing Diketopyrrolopyrroles as Linking Groups

2015 ◽  
Vol 1771 ◽  
pp. 213-219
Author(s):  
Sheng-Hsiung Yang ◽  
Chia-Hao Hsieh
Keyword(s):  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Power Conversion ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic Properties ◽  
Molecular Weights ◽  
Active Layers ◽  
Film State

ABSTRACTThe goal of this research is to synthesize novel linear and hyperbranched polythiophene derivatives containing diketopyrrolopyrrole (DPP) as linking groups, and to investigate thermal, optical, electrochemical, and photovoltaic properties of those derivatives. Polymers with high regioregularity were synthesized via the Universal Grignard metathesis polymerization. Those linear or hyperbranched polythiophenes containing DPP bridging moieties showed higher molecular weights and better thermal stability compared with normal P3HT. The UV-vis absorption spectra of the DPP-containing polymers are similar to that of P3HT in film state, while they show distinct attenuation in fluorescent emission. Finally, all polymers were blended with PC61BM and used as active layers for fabrication of inverted solar devices. The devices based on those DPP-containing polythiophenes revealed the open-circuit voltage (VOC) of 0.55–0.58 V, the short-circuit current (JSC) of 8.62–16.21 mA/cm2, the fill factor (FF) of 36–41%, and the power conversion efficiency (PCE) of 1.73–3.74%.

scholarly journals Study The Current Density-Voltage (J-V) Characteristics of α-Fe2O3 Thin Film Prepared by Spray Pyrolysis Technique

2020 ◽  
Vol 25 (1) ◽  
pp. 1-7
Author(s):  
Mohammed Sami Abd ali ◽  
Ahmed Shaker Hussein ◽  
Hayder Mohammed hadi
Keyword(s):  
Current Density ◽  
Fill Factor ◽  
Spray Pyrolysis Technique ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Saturation Current ◽  
Conversion Yield ◽  
Current Voltage

ABSTRACT:   In this work was measured characteristics (current - voltage) for the  (fe2o3 )thin films . The characteristics of the current density-voltage(J-V) were calculated at in both dark and light (100 mw/cm2) conditions. The parameters for this research of the photovoltaic samples, that is, were obtained directly from the curves of the resulting characteristics on the basic variables for the solar cell: the short circuit current density  (Jsc‏  ( ‏ , saturation current (Jo ), open-circuit voltage  (Voc) , fill factor ( FF), and efficiency of solar energy conversion (yield) ƞ ,

scholarly journals Features of model thin-film solar cells photoelectric characteristics based on a non-toxic multi-component connection CuZn2AlS4

2021 ◽  
Vol 5 (3) ◽  
pp. 242-250
Author(s):  
D. Sergeyev ◽  
K. Shunkeyev ◽  
B. Kuatov ◽  
N. Zhanturina
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Quantum Efficiency ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Thin Film Solar Cells ◽  
Current Voltage

In this paper, the features of the characteristics of model thin-film solar cells based on the non-toxic multicomponent compound CuZn2AlS4 (CZAS) are considered. The main parameters (open-circuit voltage, short-circuit current, fill factor, efficiency) and characteristics (quantum efficiency, current-voltage characteristic) of thin-film solar cells based on CZAS have been determined. The minimum optimal thickness of the CZAS absorber is found (1-1.25 microns). Deterioration of the performance of solar cells with an increase in operating temperature (280-400 K) is shown. It is revealed that in the wavelength range of 390-500 nm CZAS has a high external quantum efficiency, which allows its use in designs of multi-junction solar cells designed to absorb solar radiation in the specified range. It is shown that the combination of CZAS films with a buffer layer of non-toxic ZnS increases the performance of solar cells.

scholarly journals Steady Enhancement in Photovoltaic Properties of Fluorine Functionalized Quinoxaline-Based Narrow Bandgap Polymer

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 54 ◽  
Author(s):  
Zhonglian Wu ◽  
Huanxiang Jiang ◽  
Xingzhu Wang ◽  
Lei Yan ◽  
Wei Zeng ◽  
...  
Keyword(s):  
Fill Factor ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Hole Mobility ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Promising Candidate ◽  
Photovoltaic Properties ◽  
Narrow Bandgap

To investigate the influence of fluoride phenyl side-chains onto a quinoxaline (Qx) unit on the photovoltaic performance of the narrow bandgap (NBG) photovoltaic polymers, herein, two novel NBG copolymers, PBDTT-DTQx and PBDTT-DTmFQx, were synthesized and characterized. 2-ethylhexylthiothiophene-substituted benzodithiophene (BDTT), 2,3-diphenylquinoxaline (DQx) [or 2,3-bis(3-fluorophenyl)quinoxaline (DmFQx)] and 2-ethylhexylthiophene (T) were used as the electron donor (D) unit, electron-withdrawing acceptor (A) unit and π-bridge, respectively. Compared to non-fluorine substituted PBDTT-DTQx, fluoride PBDTT-DTmFQx exhibited a wide UV-Vis absorption spectrum and high hole mobility. An enhanced short-circuit current (Jsc) and fill factor (FF) simultaneously gave rise to favorable efficiencies in the polymer/PC71BM-based polymer solar cells (PSCs). Under the illumination of AM 1.5G (100 mW cm−2), a maximum power conversion efficiency (PCE) of 6.40% was achieved with an open-circuit voltage (Voc) of 0.87 V, a Jsc of 12.0 mA cm−2 and a FF of 61.45% in PBDTT-DTmFQx/PC71BM-based PSCs, while PBDTT-DTQx-based devices also exhibited a PCE of 5.43%. The excellent results obtained demonstrate that PBDTT-DTmFQx by fluorine atom engineering could be a promising candidate for organic photovoltaics.

scholarly journals Effects of Hole-Collecting Buffer Layers and Electrodes on the Performance of Flexible Plastic Organic Photovoltaics

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Sungho Woo ◽  
Hong-Kun Lyu ◽  
Yoon Soo Han ◽  
Youngkyoo Kim
Keyword(s):  
Indium Tin Oxide ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Series Resistance ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Buffer Layers ◽  
Large Area

Here we report the influences of the sheet resistance (Rsheet) of a hole-collecting electrode (indium tin oxide, ITO) and the conductivity of a hole-collecting buffer layer (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), PEDOT:PSS) on the device performance of flexible plastic organic photovoltaic (OPV) devices. The series resistance (RS) of OPV devices steeply increases with increasingRsheetof the ITO electrode, which leads to a significant decrease of short-circuit current density (JSC) and fill factor (FF) and power conversion efficiency, while the open-circuit voltage (VOC) was almost constant. By applying high-conductivity PEDOT:PSS, the efficiency of OPV devices with highRsheetvalues of 160 Ω/□ and 510 Ω/□ is greatly improved, by a factor of 3.5 and 6.5, respectively. These results indicate that the conductivities of ITO and PEDOT:PSS will become more important to consider for manufacturing large-area flexible plastic OPV modules.

The Side-Chain Effects on Photovoltaic Properties of Copolymers Based on Phenothiazine and Thiophene

2013 ◽  
Vol 634-638 ◽  
pp. 2621-2628 ◽  
Author(s):  
Han Sol Yoo ◽  
Dae Hee Yun ◽  
Tae Won Ko ◽  
Yong Sung Park ◽  
Je Wan Woo
Keyword(s):  
Fill Factor ◽  
Optical Band Gap ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Coupling Reaction ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Side Chain ◽  
Photovoltaic Properties ◽  
Suzuki Coupling Reaction

In this study, the alternating conductive polymers based on phenothiazine and bithiophene unit, poly[(N-10-dodecyl-phenothiazin-3,7-ylene)-alt-(2,2’-bithiophen-5-yl)] (P1) and poly[(N-10- dodecyl-phenothiazin-3,7-ylene)-alt-(4,4’-didodecyl-2,2’-bithiophen-5-yl)] (P2), were synthesized by Suzuki coupling reaction in the presence of palladium catalyst. The structures of synthesized compounds were confirmed by 1H NMR. The optical, electrochemical properties of synthesized polymers were investigated by UV-Vis, cyclic voltammetry (CV). The optical band gap of 2.22 eV and 2.50 eV was obtained from absorption onset of UV-Vis spectrum. Then, the two devices using blends of the polymer, as a donor, and PC71BM, as an acceptor, were fabricated by spin-coating. The device with a P1:PC71BM (1:4, w/w) as an active layer exhibited the best performance with an open circuit voltage (VOC) of 0.68 V, short circuit current (JSC) of 3.5 mA/cm2, fill factor (FF) of 31.8 % and power conversion efficiency (PCE) of 0.74 %.

Specifies of tandem organic solar cells using optical spacers with recombination model

2015 ◽  
Vol 12 (1) ◽  
pp. 77-82 ◽  
Author(s):  
M.R. Merad Boudia ◽  
A Cheknane ◽  
B Benyoucef
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Ideality Factor ◽  
Fill Factor ◽  
Series Resistance ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Shunt Resistance ◽  
Lumped Circuit Model

A numerical simulation study of a Tandem solar cell is presented. The parameters of single and two-diodes lumped-circuit model are usually the saturation current, the series resistance, the ideality factor, the shunt resistance and the photocurrent. It is found that the influence of the distributed series resistance on electrical characteristics can be described numerically by the application of the two models to Tandem organic solar cells. A description of the efficiency, fill factor, open circuit voltage and short circuit current on the devices are marked with series resistance, temperature and ideality factor. This approach allows one to obtain a set of parameters which is reasonable and representative of the physical system.

CoPc/CdS Hybrid Photovoltaic Device

2010 ◽  
Vol 93-94 ◽  
pp. 570-573 ◽  
Author(s):  
P. Keeratithivakorn ◽  
B. Tunhoo ◽  
T. Thiwawong ◽  
J. Nukeaw
Keyword(s):  
Power Conversion Efficiency ◽  
Layer Thickness ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Power Conversion ◽  
Cadmium Sulphide ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Organic Layer ◽  
Photovoltaic Properties

The organic-inorganic hybrid photovoltaic (PV) cells based on cadmium sulphide (CdS) and cobalt phthalocyanine (CoPc) films have been fabricated and characterized their PV performance. This investigated the effects of the organic and inorganic layer thickness on the photovoltaic properties, these thickness was controlled at various values such as 10, 30 and 50 nm. However, the performance of the hybrid photovoltaic cells was depending on the organic layer thickness. The optimize results of PV cell with CoPc 10 nm and CdS 30 nm showed an open-circuit voltage (Voc) = 0.536 V, a short-circuit current density (Jsc) = 0.1020 mA/cm2, a fill factor FF = 0.281 and a power conversion efficiency (η) = 0.01536 % under the AM1.5 conditions. Efficiency is enhanced by 22 times with the addition of a buffer layer, bathocuproine (BCP) 5 nm, the power conversion efficiency (η) value from 0.01536 to 0.34571%.

Fabrication, Illumination Dependent Electrical and Photovoltaic Properties of Au/BOD-Pyr/n-Si/In Schottky Diode

2021 ◽  
Author(s):  
Onur Ongun ◽  
Enis Taşcı ◽  
Mustafa Emrullahoğlu ◽  
Ümmühan Akın ◽  
Nihat Tuğluoğlu ◽  
...  
Keyword(s):  
Schottky Diode ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Illumination Level ◽  
Photovoltaic Properties ◽  
Current Voltage ◽  
Homo And Lumo

Abstract 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based BOD-Pyr compound was synthesized according to the literature and  HOMO and LUMO energies of the BOD-Pyr were calculated by DFT/B3LYP/6-311G(d,p) method using on Gaussian 09W. Au/BOD-Pyr/n-Si/In Schottky diode were fabricated using thermal evaporation and spin coating technique. The electronic and photovoltaic properties of Au/BOD-Pyr/n-Si/In photodiode have been investigated by current-voltage (I-V) measurements at dark and under various illumination intensities. The calculated ideality factor and barrier height of the diode in dark were found to be 2.84 and 0.75 eV, respectively. These parameters were also obtained under 100 mW/cm2 illumination level as 1.55 and 0.87 eV, respectively. The values of open-circuit voltage and short circuit current density were obtained as 0.26 V and 0.56 mA/cm2 under the illumination level of 100 mW/cm2. These all findings suggest that Au/BOD-Pyr/n-Si/In device can be used as photodiode in optoelectronic applications.

The Measurement of Silicide Schottky Barrier Heights by Use of Photovoltaic Techniques

1983 ◽  
Vol 25 ◽  
Author(s):  
T.F. Kuech ◽  
C.S. Wu ◽  
S.S. Lau
Keyword(s):  
Schottky Barrier ◽  
Barrier Height ◽  
Series Resistance ◽  
Short Circuit ◽  
Forward Bias ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Ideal Behavior ◽  
Barrier Heights

ABSTRACTSchottky barrier structures often exhibit forward bias current voltage characteristics possessing a marked deviation from ideal behavior. In many cases, this deviation can be attributed to the influence of an appreciable series resistance on the diode characteristic making the determination of the actual Schottky barrier height from this characteristic difficult. In a study of rare earth silicides on Si, the present authors have successfully employed an alternative technique which overcomes this series resistance effect. This technique is derived from the conventional methods for obtaining barrier height and series resistance values in photovoltaic devices, although not necessarily requiring transparent metallizations. Photogenerated current from the device periphery is utilized here in the determination of the barrier height. The measurement of both open circuit voltage and the short circuit current at varying illumination intensities allows the junction characteristic to be determined essentially free from series resistance effects. A comparison will be made between the values of the barrier height derived from conventional J-V and photoresponse measurements, with photovoltaic measurements made on structures possessing either a semi-transparent or opaque metallization.

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