scholarly journals Indium-Doped Zinc Oxide Thin Films as Effective Anodes of Organic Photovoltaic Devices

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Ziyang Hu ◽  
Baochen Jiao ◽  
Jianjun Zhang ◽  
Xiaodan Zhang ◽  
Ying Zhao
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Bulk Heterojunction ◽  
Low Cost ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Ultrasonic Spray Pyrolysis ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Organic Photovoltaic

Indium-doped zinc oxide (IZO) thin films were prepared by low-cost ultrasonic spray pyrolysis (USP). Both a low resistivity (3.13×10−3 Ω cm) and an average direct transmittance (400∼1500 nm) about 80% of the IZO films were achieved. The IZO films were investigated as anodes in bulk-heterojunction organic photovoltaic (OPV) devices based on poly(3-hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester. The device fabricated on IZO film-coated glass substrate showed an open circuit voltage of 0.56 V, a short circuit current of 8.49 mA cm-2, a fill factor of 0.40, and a power conversion efficiency of 1.91%, demonstrating that the IZO films prepared by USP technique are promising low In content and transparent electrode candidates of low-cost OPV devices.

New Physical and Chemical Treatments to Improve the Quantum Efficiency in Polymer Solar Cells

2008 ◽  
Vol 1091 ◽  
Author(s):  
Osamu Yoshikawa ◽  
Taro Sonobe ◽  
Takashi Sagawa ◽  
Susumu Yoshikawa
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Single Mode ◽  
Short Circuit Current ◽  
Microwave Treatment ◽  
Short Circuit Current Density ◽  
Open Circuit

AbstractThe performance of the devices of bulk heterojunction polymer-based solar cells were investigated by using poly(3-hexylthiophene) (P3HT) and (6,6)-phenyl C61 butyric acid methyl ester (PCBM) as light absorption (viz. active) layer, with TiOx as interlayer as follows: ITO/PEDOT:PSS/P3HT-PCBM/TiOx/Al [1] through the treatment of microwave irradiation (single mode of 2.45 GHz, 800 W for 1, 2.5, or 5 min). Such treatments enabled to increase the short-circuit current density Jsc (from 4.53 mA cm−2 to 7.27 mA cm−2) and fill factor FF (from 0.41 to 0.66) of the cell, though the open circuit voltage Voc was decreased (from 0.61 V to 0.57 V) along the irradiation. Absorption spectra of P3HT-PCBM blended film before and after the microwave treatment were observed. Shoulders at 550 nm and 600 nm appeared after the irradiation. This result implies that the microcrystallization of P3HT was slightly promoted through the microwave treatment.

Performance of P3HT:PCBM Organic Solar Cell with ZnO Buffer Layer

2014 ◽  
Vol 925 ◽  
pp. 580-584 ◽  
Author(s):  
Mohamad Syafiq Alias ◽  
Sharul Ashikin Kamaruddin ◽  
Che Ani Norhidayah ◽  
Nurulnadia Sarip ◽  
Nayan Nafarizal ◽  
...  
Keyword(s):  
Solar Cell ◽  
Buffer Layer ◽  
Organic Solar Cell ◽  
Bulk Heterojunction ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Surface Topology ◽  
Solar Simulator

In this paper, we explore the characteristics of bulk heterojunction solar cell based on poly (3-hexyl thiophene) [P3HT] and [6,6]-phenyl-C61-butyric acid methyl ester [PCBM] by introducing a buffer layer with device configuration of ITO/ZnO/P3HT:PCBM/Au. Nanostructured ZnO with individual diameter around 20-50 nm was used as the buffer layer and its effects on the short circuit current density, Jsc and open circuit voltage, Voc were investigated. It was found that, the electrical characteristic of the organic solar cell was obviously changed by introducing the buffer layer. Solar cell characteristic with Voc of 0.3939 V was obtained but the Jsc was very small. The surface topology of the P3HT:PCBM was investigated using an atomic force microscopy (AFM). ZnO nanoparticles were observed using a field emission scanning electron microscope (FESEM) and the electrical properties of the solar cell was measured using a solar simulator with a current – voltage (I-V) measurement system.

The modulation of bulk-organic solar cells: the effect of serial and parallel resistances and the relationship with the microscopic morphology

2011 ◽  
Vol 1359 ◽  
Author(s):  
A.J. Trindade ◽  
M.G. Santos ◽  
J. Gomes ◽  
L. Pereira
Keyword(s):  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Relevant Parameter ◽  
Strong Impact ◽  
Microscopic Morphology ◽  
The Relationship

ABSTRACTThis work shows the relationship between the morphology (studied by AFM) of an active bulk-heterojunction (BHJ) layer composed by MEH-PPV (poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene) and PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) and the respective photovoltaic figures of merit. It is observed that the most relevant parameter (influencing the efficiency) is the fill-factor (FF), as both the open circuit voltage and short circuit current are not significantly affected by the microscopic morphology. Different local conformation of the active films can change the FF from near 25% to more than 65%, having a strong impact in the efficiency. These results were modulated by an equivalent circuit. Serial and parallel resistances were related with the physical behavior of the organic cells. These were observed to have a direct relationship with the achieved morphology.

The Essence and Efficiency Limits of Bulk-Heterostructure Organic Solar Cells

2012 ◽  
Vol 1390 ◽  
Author(s):  
M. Alam ◽  
B. Ray ◽  
M. Khan ◽  
S. Dongaonkar
Keyword(s):  
Organic Solar Cells ◽  
Carrier Transport ◽  
High Efficiency ◽  
Bulk Heterojunction ◽  
Low Cost ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Substantial Improvement ◽  
Open Circuit ◽  
Future Improvement

Abstract:Since its introduction in early 1990s, bulk-heterojunction organic photovoltaic solar cell (BHJ-OPV) has promised high-efficiency at ultra-low cost and weight, with potential for non-traditional applications such as building-integrated PV. There is a widespread presumption, however, that the complexity of morphology makes carrier transport in OPV irreducibly complicated, and possibly, beyond predictive modeling. In this paper, we use elementary and intuitive arguments to derive the fundamental thermodynamic as well as morphology-specific practical limits of BHJ-OPV efficiency. We find that constraints of the percolation threshold and trade-off among short-circuit current, open circuit voltage, and fill factor make substantial improvement in OPV efficiency difficult. We posit that future improvement in OPV will rely not on morphology engineering, or reducing the polymer bandgap, but on increasing both the effective μ × τ product and the cross-gap between donor/acceptors. Even if the OPV fails to achieve the highest efficiency anticipated by the thermodynamic limit, its novel form factor, lightweight, and transparency can make it a commercially viable option for many applications.

scholarly journals Solution-Processed Bulk Heterojunction Solar Cells with Silyl End-Capped Sexithiophene

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Jung Hei Choi ◽  
Mohamed E. El-Khouly ◽  
Taehee Kim ◽  
Youn-Su Kim ◽  
Ung Chan Yoon ◽  
...  
Keyword(s):  
Bulk Heterojunction ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Hole Mobility ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Photovoltaic Properties ◽  
Solution Processed ◽  
Heterojunction Solar Cells

We fabricated solution-processed organic photovoltaic cells (OPVs) using substituted two sexithiophenes, a,w-bis(dimethyl-n-octylsilyl)sexithiophene (DSi-6T) and a,w-dihexylsexithiophene (DH-6T), as electron donors, and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as an electron acceptor. Solution-processed OPVs usingDH-6TandDSi-6Tshowed good photovoltaic properties in spite of their poor solubility. The best performance was observed onDSi-6T : PCBM 1 : 5 (w/w) blend cell with an open circuit voltage (Voc) of 0.63 V, short circuit current density (Jsc) of 1.34 mA/cm2, fill factor (FF) of 55%, and power conversion efficiency of 0.44% under AM 1.5 G illumination. AlthoughDH-6Thas higher hole mobility thanDSi-6T, theDSi-6T : PCBM blend cell showed higher hole mobility thanDH-6T : PCBM cell. Therefore,DSi-6Tcell showed higher device performance thanDH-6Tcell due to its silyl substitutions, which lead to the increase of the solubility. The incorporation of solution-processed TiO2interfacial layer in theDSi-6T : PCBM devices significantly enhances FF due to the reduced charge recombination near active layer/Al interface.

scholarly journals P3HT:PCBM Incorporated with Silicon Nanoparticles as Photoactive Layer in Efficient Organic Photovoltaic Devices

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Shang-Chou Chang ◽  
Yu-Jen Hsiao ◽  
To-Sing Li
Keyword(s):  
Silicon Nanoparticles ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Photoactive Layer

Silicon nanoparticles doped poly(3-hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester blends (P3HT:PCBM: Si NP) have been produced as the photoactive layer of organic photovoltaic devices (OPVs). The silicon nanoparticles’ size is between 80 and 100 nm checked by transmission electron microscope (TEM). The 0.35 wt% Si NP doping OPVs exhibit higher power conversion efficiency (PCE) than other OPVs. The PCE of the OPVs increases from 3.01% to 3.38% mainly due to increasing short-circuit current density from 8.38 to 9.48 mA/cm2, while the open-circuit voltage remains the same. The Si NP can provide extra exciton separation and electron pathways in hybrid solar cells.

scholarly journals Prediction of Solar Irradiance Based on Artificial Neural Networks

Inventions ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 45 ◽  
Author(s):  
Waleed I. Hameed ◽  
Baha A. Sawadi ◽  
Safa J. Al-Kamil ◽  
Mohammed S. Al-Radhi ◽  
Yasir I. A. Al-Yasir ◽  
...  
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Solar Irradiance ◽  
Open Circuit Voltage ◽  
Low Cost ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Pv Module ◽  
Artificial Neural

Prediction of solar irradiance plays an essential role in many energy systems. The objective of this paper is to present a low-cost solar irradiance meter based on artificial neural networks (ANN). A photovoltaic (PV) mathematical model of 50 watts and 36 cells was used to extract the short-circuit current and the open-circuit voltage of the PV module. The obtained data was used to train the ANN to predict solar irradiance for horizontal surfaces. The strategy was to measure the open-circuit voltage and the short-circuit current of the PV module and then feed it to the ANN as inputs to get the irradiance. The experimental and simulation results showed that the proposed method could be utilized to achieve the value of solar irradiance with acceptable approximation. As a result, this method presents a low-cost instrument that can be used instead of an expensive pyranometer.

scholarly journals SCAPS Simulation on P3HT:Graphene Nanocomposites Based Bulk-Heterojunction Organic Solar Cells

2019 ◽  
Vol 9 (1) ◽  
pp. 28
Author(s):  
Nur Shakina Mohd Shariff ◽  
Puteri Sarah Mohamad Saad ◽  
Mohamad Rusop Mahmood
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Bulk Heterojunction ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Simulation Software ◽  
Capacitance Voltage

There has been an increasing interest towards organic solar cells after the discovery of conjugated polymer and bulk-heterojunction concept. Eventhough organic solar cells are less expensive than inorganic solar cells but the power conversion energy is still considered low. The main objective of this research is to investigate the effect of the P3HT’s thickness and concentration towards the efficiency of the P3HT:Graphene solar cells. A simulation software that is specialize for photovoltaic called SCAPS is used in this research to simulate the effect on the solar cells. The solar cell’s structure will be drawn inside the simulation and the parameters for each layers is inserted. The result such as the open circuit voltage (Voc), short circuit current density (Jsc), fill factor (FF), efficiency (η), capacitance-voltage (C-V) and capacitance-frequency (C-f) characteristic will be calculated by the software and all the results will be put into one graph.

IODINE/IODIDE-FREE AND POLYMER HETEROJUNCTION-SENSITIZED HYBRID SOLAR CELL

2012 ◽  
Vol 05 (02) ◽  
pp. 1260004 ◽  
Author(s):  
GENTIAN YUE ◽  
JIHUAI WU ◽  
YUNFANG HUANG ◽  
YAOMING XIAOMING XIAO ◽  
ZHANG LAN
Keyword(s):  
Solar Cell ◽  
Short Circuit ◽  
Electric Energy ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Hybrid Solar Cell ◽  
Light Transport ◽  
Simulated Solar Light

An iodine/iodide-free and polymer heterojunction-sensitized hybrid solar cell is fabricated by using 6,6-phenyl- C61 -butyric acid methyl ester (PCBM) as electronic acceptor, poly(3-hexylthiophene) (P3HT) as donor and TiO2 film as substrate. The PCBM–P3HT heterojunction can harvest ultraviolet-visible light, transport charge carriers, replacing the dyes and electrolytes in dye-sensitized solar cell. The cell with a PCBM/P3HT ratio of 1:2 shows a short circuit current of 5.47 mA⋅cm-2, an open circuit voltage of 0.849 V, a fill factor of 0.640 and a light-to-electric energy conversion efficiency of 2.97% under a simulated solar light irradiation of 100 mW⋅cm-2.

Sign in / Sign up

Export Citation Format

Share Document