Effects of Surface Treatment on the Performance of PEDOT: PSS/n-GaN Schottky Solar Cells

2014 ◽  
Vol 492 ◽  
pp. 331-334
Author(s):  
Qian Feng ◽  
Kai Du ◽  
Yu Kun Li ◽  
Peng Shi ◽  
Qing Feng
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Surface Treatment ◽  
Ideality Factor ◽  
Oxygen Plasma ◽  
Schottky Contact ◽  
Schottky Contacts ◽  
Electrical Performance ◽  
Contact Material ◽  
Plasma Treatments

We developed heterojunction-based Schottky solar cells consisting of π-conjugated polymers and n-type GaN. PEDOT: PSS was used as the transparent Schottky contact material. In order to improve the performance of solar cells, the effects of surface treatment on the electrical performance of PEDOT: PSS/n-GaN Schottky contacts were investigated. The Voc increased from 0.52V to 0.62V,0.54V and 0.54V and Isc from 0.33 mA/cm2 to 0.45mA/cm2,0.40mA/cm2 and 0.35mA/cm2 after HCl, HF solution and oxygen plasma treatments. The I-V and the XPS measurements indicated that the barrier height of PEDOT:PSS/n-GaN was increased from 0.62eV to 0.76eV, 0.72eV and 0.70eV and the ideality factor improved from 1.81 to 1.63, 1.67 and 1.73 respectively, which induced the variation of the solar cells characteristics..

scholarly journals Study of the surface properties of ZnO nanocolumns used for thin-film solar cells

2017 ◽  
Vol 8 ◽  
pp. 446-451 ◽  
Author(s):  
Neda Neykova ◽  
Jiri Stuchlik ◽  
Karel Hruska ◽  
Ales Poruba ◽  
Zdenek Remes ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Plasma Treatment ◽  
Surface Properties ◽  
Oxygen Plasma ◽  
Fused Silica ◽  
Thin Film Solar Cells ◽  
Oxygen Plasma Treatment ◽  
Strong Impact ◽  
Plasma Treatments

Densely packed ZnO nanocolumns (NCs), perpendicularly oriented to the fused-silica substrates were directly grown under hydrothermal conditions at 90 °C, with a growth rate of around 0.2 μm/h. The morphology of the nanostructures was visualized and analyzed by scanning electron microscopy (SEM). The surface properties of ZnO NCs and the binding state of present elements were investigated before and after different plasma treatments, typically used in plasma-enhanced CVD solar cell deposition processes, by X-ray photoelectron spectroscopy (XPS). Photothermal deflection spectroscopy (PDS) was used to investigate the optical and photoelectrical characteristics of the ZnO NCs, and the changes induced to the absorptance by the plasma treatments. A strong impact of hydrogen plasma treatment on the free-carrier and defect absorption of ZnO NCs has been directly detected in the PDS spectra. Although oxygen plasma treatment was proven to be more efficient in the surface activation of the ZnO NC, the PDS analysis showed that the plasma treatment left the optical and photoelectrical features of the ZnO NCs intact. Thus, it was proven that the selected oxygen plasma treatment can be of great benefit for the development of thin film solar cells based on ZnO NCs.

Improvement in Electrical Performance of Schottky Contacts for High-Voltage Diode

2005 ◽  
Vol 483-485 ◽  
pp. 721-724 ◽  
Author(s):  
Tomonori Nakamura ◽  
Toshiyuki Miyanagi ◽  
Hidekazu Tsuchida ◽  
Isaho Kamata ◽  
Tamotsu Jikimoto ◽  
...  
Keyword(s):  
High Temperature ◽  
Schottky Barrier ◽  
High Voltage ◽  
Ideality Factor ◽  
Schottky Barrier Height ◽  
Schottky Contacts ◽  
Electrical Performance ◽  
High Temperature Annealing ◽  
Excess Current ◽  
Blocking Voltage

We investigated the effect of high temperature annealing on the Schottky barrier height (Fb) and the ideality factor (n-factor) of a Mo contact. In a Mo contact, the Fb increased and the leakage current decreased by annealing at 600oC, while no increase in n-factor and forward excess current owing to the high temperature annealing was observed. The Schottky barrier diode with Mo contact annealed at 600oC showed a blocking-voltage (Vb) of 4.15 kV and a specific on resistance (Ron) of 9.07 mWcm2, achieving a high Vb 2/Ron value of 1898 MW/cm2.

4H-SiC Schottky Diodes for Temperature Sensing Applications in Harsh Environments

2011 ◽  
Vol 679-680 ◽  
pp. 575-578 ◽  
Author(s):  
Gheorghe Brezeanu ◽  
Florin Draghici ◽  
F. Craciunioiu ◽  
C. Boianceanu ◽  
F. Bernea ◽  
...  
Keyword(s):  
Ideality Factor ◽  
Temperature Sensor ◽  
Schottky Diodes ◽  
Schottky Contact ◽  
Cement Industry ◽  
Temperature Sensing ◽  
Electrical Performance ◽  
Harsh Environments ◽  
Sensing Applications ◽  
Contact Parameters

4H-SiC Schottky Barrier Diodes (SBDs) with remarkable electrical performance have been fabricated and characterised. A barrier height about 1.64V and an ideality factor close to 1 are extracted from the forward characteristics measured at several temperatures. These essential Schottky contact parameters are observed to be constant with temperature. A temperature probe with a simple and innovative scheme is designed and applied. The probe uses SiC SBDs as temperature sensor in the 20-4000C range, with measured sensitivities varying from 1.3 mV/K to 2.8 mV/K. The probe is meant to monitorize the temperature inside the furnaces, in the cement industry.

scholarly journals Modifications of the CZTSe/Mo back-contact interface by plasma treatments

RSC Advances ◽  
2019 ◽  
Vol 9 (46) ◽  
pp. 26850-26855 ◽  
Author(s):  
Wenjian Chen ◽  
Teoman Taskesen ◽  
David Nowak ◽  
Ulf Mikolajczak ◽  
Mohamed H. Sayed ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Thin Film Solar Cells ◽  
Back Contact ◽  
Contact Material ◽  
Contact Interface ◽  
Tin Selenide ◽  
Plasma Treatments ◽  
Copper Zinc ◽  
Ar Plasma

Molybdenum (Mo) is the most commonly used back-contact material for copper zinc tin selenide (CZTSe)-based thin-film solar cells. The effect of a pure Ar plasma and a mixed Ar–N2 plasma on the back-contact interface of CZTSe solar cells is reported in this study.

Microstructure studies of tungsten silicide schottky contacts on Gaas

1987 ◽  
Vol 45 ◽  
pp. 328-329
Author(s):  
Yih-Cheng Shih ◽  
E. L. Wilkie
Keyword(s):  
Thermal Stability ◽  
Field Effect Transistors ◽  
Schottky Contact ◽  
Schottky Contacts ◽  
Excellent Thermal Stability ◽  
Barrier Heights ◽  
Gaas Substrates ◽  
Film Adhesion ◽  
Threshold Voltages ◽  
Thermal Stability Of

Tungsten silicides (WSix) have been successfully used as the gate materials in self-aligned GaAs metal-semiconductor-field- effect transistors (MESFET). Thermal stability of the WSix/GaAs Schottky contact is of major concern since the n+ implanted source/drain regions must be annealed at high temperatures (∼ 800°C). WSi0.6 was considered the best composition to achieve good device performance due to its low stress and excellent thermal stability of the WSix/GaAs interface. The film adhesion and the uniformity in barrier heights and ideality factors of the WSi0.6 films have been improved by depositing a thin layer of pure W as the first layer on GaAs prior to WSi0.6 deposition. Recently WSi0.1 has been used successfully as the gate material in 1x10 μm GaAs FET's on the GaAs substrates which were sputter-cleaned prior to deposition. These GaAs FET's exhibited uniform threshold voltages across a 51 mm wafer with good film adhesion after annealing at 800°C for 10 min.

scholarly journals A comparative approach to enhance the electrical performance of PEDOT:PSS as transparent electrode for organic solar cells

2019 ◽  
Vol 28 (1) ◽  
pp. 66-73
Author(s):  
Ismail Borazan ◽  
Ayşe Celik Bedeloğlu ◽  
Ali Demir
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Isopropyl Alcohol ◽  
Power Conversion ◽  
Acid Methyl Ester ◽  
Transparent Electrode ◽  
Electrical Performance ◽  
Comparative Approach ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester

In this article, the improvement in electrical performance of poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT:PSS) as the transparent electrode doped with different additives (ethylene glycol (EG), isopropyl alcohol) or treatment of sulfuric acid was enhanced that organic solar cells (OSCs) were produced by using poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl C61 butyric acid methyl ester. OSCs were fabricated by the doped or treated PEDOT:PSS films as transparent electrodes. The photoelectrical measurements were carried out and the effects of doping or treatment were compared. As a result, EG-added PEDOT:PSS electrode showed the best power conversion efficiency value of 1.87% among the PEDOT:PSS anodes.

Direct Arylation Polycondensation towards Water/Alcohol-Soluble Conjugated Polymers as Electron Transporting Layers for Organic Solar Cells

2021 ◽  
Author(s):  
Kaiwen Lin ◽  
Qingwu Yin ◽  
Zhenfeng Wang ◽  
Boming Xie ◽  
Chunhui Duan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Organic Solar Cells ◽  
Direct Arylation ◽  
Direct Arylation Polycondensation ◽  
Water Alcohol

Two water/alcohol soluble conjugated polymers (WSCPs), based on naphthalenediimide and amino-functionalized 3,4-(propylenedioxy)thiophene were synthesized via direct arylation polycondensation (DArP). The polymers worked well as electron transporting layers (ETLs) for fullerene-based...

scholarly journals Designing few-layer graphene Schottky contact solar cells: Theoretical efficiency limits and parametric optimization

2021 ◽  
Vol 118 (5) ◽  
pp. 053103
Author(s):  
Xin Zhang ◽  
Jicheng Wang ◽  
Lay Kee Ang ◽  
Yee Sin Ang ◽  
Juncheng Guo
Keyword(s):  
Solar Cells ◽  
Parametric Optimization ◽  
Schottky Contact ◽  
Layer Graphene ◽  
Few Layer Graphene

scholarly journals Optical Performance of Single Point-Focus Fresnel Lens Concentrator System for Multiple Multi-Junction Solar Cells—A Numerical Study

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4301
Author(s):  
Yassir A. Alamri ◽  
Saad Mahmoud ◽  
Raya Al-Dadah ◽  
Shivangi Sharma ◽  
J. N. Roy ◽  
...  
Keyword(s):  
Solar Cells ◽  
Numerical Study ◽  
Single Point ◽  
Optical Element ◽  
Fresnel Lens ◽  
Electrical Performance ◽  
High Concentration ◽  
Three Dimensional Model ◽  
Optical Efficiency ◽  
Concave Lens

This paper investigates the potential of a new integrated solar concentrated photovoltaic (CPV) system that uses a solo point focus Fresnel lens for multiple multi-junction solar cells (MJSCs). The proposed system comprises of an FL concentrator as the primary optical element, a multi-leg homogeniser as the secondary optical element (SOE), a plano-concave lens, and four MJSCs. A three-dimensional model of this system was developed using the ray tracing method to predict the influence of aperture width, height, and position with respect to MJSCs of different reflective and refractive SOE on the overall optical efficiency of the system and the irradiance uniformity achieved on the MJSCs’ surfaces. The results show that the refractive homogeniser using N-BK7 glass can achieve higher optical efficiency (79%) compared to the reflective homogeniser (57.5%). In addition, the peak to average ratio of illumination at MJSCs for the reflective homogeniser ranges from 1.07 to 1.14, while for the refractive homogeniser, it ranges from 1.06 to 1.34, causing minimum effects on the electrical performance of the MJSCs. The novelty of this paper is the development of a high concentration CPV system that integrates multiple MJSCs with a uniform distribution of rays, unlike the conventional CPV systems that utilise a single concentrator onto a single MJSC. The optical efficiency of the CPV system was also examined using both the types of homogeniser (reflective and refractive).

Sign in / Sign up

Export Citation Format

Share Document