DEPENDENCE OF ORGANIC/INORGANIC PHOTOVOLTAIC DEVICE PERFORMANCE ON PRECURSOR'S CONCENTRATION USED FOR ELECTROSPUN TiO2 NANOFIBERS

NANO ◽  
2013 ◽  
Vol 08 (03) ◽  
pp. 1350033 ◽  
Author(s):  
MUHAMMAD TANVEER ◽  
AMIR HABIB ◽  
MUHAMMAD BILAL KHAN
Keyword(s):  
Absorption Spectroscopy ◽  
Conversion Efficiency ◽  
Composite Nanofibers ◽  
Photovoltaic Device ◽  
Device Performance ◽  
Photovoltaic Devices ◽  
Tio2 Nanofibers ◽  
Incident Photon

Electrospun TiO2 nanofibers were synthesized by optimizing various electrospinning conditions. The effect of the precursor's concentration present in sol used for electrospinning was studied for the performance of hybrid photovoltaic devices. The synthesized nanofibers were characterized by XRD and UV-Vis absorption spectroscopy and morphology of the fibers were investigated by FE-SEM. The surface of fibers was modified, and these modified fibers were applied to P3HT/ TiO2 / N719 composite nanofibers photovoltaic devices. The device performance was investigated by analysis of the incident photon to current conversion efficiency and a J– V characteristic under 1. 5G illuminations, which show that efficiency of the devices, can be improved from 0.13% to 0.83% by introducing TiO2 nanofibers synthesized by optimum precursor's concentration.

Defects in Copper Indium Aluminum Diselenide Films and their Impact on Photovoltaic Device Performance

2003 ◽  
Vol 763 ◽  
Author(s):  
Jennifer T. Heath ◽  
J. David Cohen ◽  
William N. Shafarman
Keyword(s):  
Electronic Properties ◽  
Photovoltaic Device ◽  
Absorber Layer ◽  
Device Performance ◽  
Photovoltaic Devices ◽  
Al Content ◽  
Copper Indium

AbstractThe electronic properties of polycrystalline CuIn1-xAlxSe2 (CIAS) films, which are incorporated as the absorber layer in photovoltaic devices, have been studied to better understand limitations on device performance. These studies have shown that compared to lower Al content films and to CuIn1-yGaySe2films, films with x ≥ 0.29 are relatively intrinsic, spatially nonuniform, and have broader bandtails characterized by much higher Urbach energies. This indicates that the CIAS films with x ≥ 0.29 are significantly more disordered than lower Al content CIAS or corresponding CIGS films, which likely negatively impacts the resulting photovoltaic device performance.

Effects of Inserting Highly Polar Salts Between the Cathode and Active Layer of Bulk Heterojunction Photovoltaic Devices

2001 ◽  
Vol 665 ◽  
Author(s):  
Sean E. Shaheen ◽  
Christoph J. Brabec ◽  
N. Serdar Sariciftci ◽  
Ghassan E. Jabbour
Keyword(s):  
Dipole Moment ◽  
Power Conversion Efficiency ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Device Performance ◽  
Photovoltaic Devices ◽  
Thermal Deposition

ABSTRACTThermal deposition of small amounts of various salts at the interface between the active layer and the aluminum cathode was shown to alter the performance of bulk heterojunction photovoltaic devices. LiF and LiBr were found to enhance the power conversion efficiency as compared to devices with no interfacial salt, but Cs and K compounds were found to severely diminish the device performance. It is suggested that the Li compounds preferentially align to produce a bulk dipole moment at the interface, whereas the Cs and K compounds do not.

Interfacial self-assembly engineering for constructing a 2D flexible superlattice polyoxometalate/rGO heterojunction for high-performance photovoltaic devices

2020 ◽  
Vol 49 (12) ◽  
pp. 3766-3774 ◽  
Author(s):  
Jianping Li ◽  
Dai Wu ◽  
Chunlei Wang ◽  
Ding Liu ◽  
Weilin Chen ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Self Assembly ◽  
High Performance ◽  
Photoelectric Conversion Efficiency ◽  
Photovoltaic Devices ◽  
Photoelectric Conversion

The strategy of constructing a 2D flexible superlattice polyoxometalate/rGO heterojunction is proposed to improve the photoelectric conversion efficiency of photovoltaic devices.

scholarly journals Lateral PbS Photovoltaic Devices for High Performance Infrared and Terahertz Photodetectors

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1692
Author(s):  
Emmanuel K. Ampadu ◽  
Jungdong Kim ◽  
Eunsoon Oh
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Photovoltaic Device ◽  
Photovoltaic Devices ◽  
Temperature Spectrum ◽  
Terahertz Region ◽  
Room Temperature Spectrum ◽  
Ftir Spectrometer ◽  
Titanium Substrates ◽  
Deposition Conditions

We fabricated a lateral photovoltaic device for use as infrared to terahertz (THz) detectors by chemically depositing PbS films on titanium substrates. We discussed the material properties of PbS films grown on glass with varying deposition conditions. PbS was deposited on Ti substrates and by taking advantage of the Ti/PbS Schottky junction, we discussed the photocurrent transients as well as the room temperature spectrum response measured by Fourier transform infrared (FTIR) spectrometer. Our photovoltaic PbS device operates at room temperature for wavelength ranges up to 50 µm, which is in the terahertz region, making the device highly applicable in many fields.

scholarly journals Tailoring the CdS/CdSe/CdTe multilayer structure for optimization of photovoltaic device performance guided by mapping spectroscopic ellipsometry

2021 ◽  
Vol 221 ◽  
pp. 110907
Author(s):  
Mohammed A. Razooqi Alaani ◽  
Prakash Koirala ◽  
Puja Pradhan ◽  
Adam B. Phillips ◽  
Nikolas J. Podraza ◽  
...  
Keyword(s):  
Spectroscopic Ellipsometry ◽  
Multilayer Structure ◽  
Photovoltaic Device ◽  
Device Performance

A universal approach for optimizing charge extraction in electron transporting layer-free organic solar cells via Lewis base doping

2019 ◽  
Vol 7 (45) ◽  
pp. 25808-25817
Author(s):  
Rong Wang ◽  
Boxin Wang ◽  
Jianqiu Wang ◽  
Xuning Zhang ◽  
Dongyang Zhang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Photovoltaic Device ◽  
Lewis Base ◽  
Device Performance ◽  
Universal Approach ◽  
Electron Transporting Layer ◽  
Charge Extraction ◽  
Base Doping

Applying anion-induced electron transfer doping with a series of TXABr salts to non-fullerene organic solar cells enables to tune the doping efficiency and photovoltaic device performance.

Fabrication of low dielectric constant polyimide/TiO2 nanofibers with enhanced UV-light shielding properties

2018 ◽  
Vol 31 (8) ◽  
pp. 986-995
Author(s):  
Lei Wang ◽  
Guifen Gong ◽  
Junyao Shen ◽  
Jinsong Leng
Keyword(s):  
Dielectric Constant ◽  
Light Absorption ◽  
Composite Nanofibers ◽  
Uv Light ◽  
Dielectric Constants ◽  
Low Dielectric Constant ◽  
Number Density ◽  
Tio2 Nanofibers ◽  
Low Dielectric ◽  
Mechanical Tensile

Polyimide (PI)/titanium dioxide (TiO2) composite nanofibers (NFs) with average diameters of 200–250 nm were synthesized via electrospinning. The total number density of dipoles decreased significantly, owing to the porous structures and compact interface between TiO2 NPs and PI matrix. All PI/TiO2 NFs maintain low dielectric constants and losses. For example, the dielectric constants of PI/TiO2-6% NFs are all lower than 2.6, being exposed to temperatures from 25°C to 200°C. Meantime, the dielectric losses of PI/TiO2-6% NFs are below 0.005. For ultraviolet (UV)-light shielding performance, the PI/TiO2 NFs exhibited good UV-light shielding and corresponding anti-photoaging properties. The reason can be ascribed from high UV-light absorption and scattering ability in the TiO2 NPs. The best UV-light absorption (average: 3.71) and corresponding absorption decay (15.13%) were achieved for optimized PI/TiO2-6% NFs. Other fundamental characteristics, such as the thermal stability, mechanical tensile property, and hydrophobicity, were also investigated. Such low dielectric constant PI/TiO2 composite NFs can be alternatively chosen under a longtime UV-light exposing condition.

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