The effect of net carriers at the interconnection layer in tandem organic solar cells

2021 ◽  
Author(s):  
Li-Jia Chen ◽  
Guo-Xi Niu ◽  
Lian-Bin Niu ◽  
Qun-Liang Song
Keyword(s):  
Organic Solar Cells ◽  
Indium Tin Oxide ◽  
Open Circuit Voltage ◽  
Copper Phthalocyanine ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Carrier Generation ◽  
Tandem Cell ◽  
Carrier Recombination

Abstract Tandem cell with structure of indium tin oxide (ITO)/ molybdenum oxide (MoO3)/ fullerene (C60) / copper phthalocyanine (CuPc)/ C60 / tris-8-hydroxy- quinolinato aluminum (Alq3)/Al was fabricated to study the effect of net carriers at the interconnection layer. The open circuit voltage and short circuit current were found to be 1.15 V and 0.56 mA/cm2, respectively. Almost the same performance (1.05 V, 0.58 mA/cm2) of tandem cell with additional recombination layer (ITO/MoO3/C60/Alq3/Al/Ag/MoO3/CuPc/C60/Alq3/Al) demonstrates that carrier balance is more crucial than carrier recombination. The net holes at the interconnection layer caused by more carrier generation from the back cell on one hand would enhance the recombination with electrons from the front cell and on the other hand would quench the excitons produced in CuPc of the back cell.

Effect of Various Structures on the Efficiency of Organic Solar Cells

2013 ◽  
Vol 311 ◽  
pp. 419-423
Author(s):  
Kan Lin Chen ◽  
D.W. Chou ◽  
Chien Jung Huang ◽  
Jhong Ciao Ke ◽  
Wen Ray Chen ◽  
...  
Keyword(s):  
Organic Solar Cells ◽  
Indium Tin Oxide ◽  
Dark Current ◽  
Copper Phthalocyanine ◽  
Bulk Heterojunction ◽  
Collection Efficiency ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Absorption Efficiency ◽  
Open Circuit

Small molecule organic solar cell with an optimized structure of indium tin oxide (ITO)/copper phthalocyanine (CuPc) (10nm)/CuPc: C60mixed (20nm)/fullerene (C60) (20nm)/bathocuproine (BCP) (10nm)/Al) was fabricated. With optimizing the hybrid planar-mixed molecular heterojunction (PM-HJ) from the double layer heterojunction (HJ) and the bulk heterojunction (BHJ), the short-circuit current density (Jsc) increased from 3.09 to 5.11mA/cm2, the open-circuit voltage (Voc) increased from 0.40 to 0.47V, and the power conversion efficiency (ηp) increased from 0.66 to 1.28% under 100mW/cm2 AM1.5G illumination. These improvements were attributed to reach the optimal balance among the light absorption efficiency, the exciton dissociation efficiency and the carrier collection efficiency of the device, resulting in enhancement of Jscwithout affecting the value of fill factor (FF) and the reduction of the dark current. Furthermore a decrease of dark current is caused to the higher Voc.

An Improved Triple-Tandem Organic Solar Cell

2009 ◽  
Vol 1212 ◽  
Author(s):  
Dewei Zhao ◽  
Xiao Wei Sun ◽  
Lin Ke ◽  
Swee Tiam Tan
Keyword(s):  
Solar Cell ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Copper Phthalocyanine ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Solar Irradiation ◽  
The Third

AbstractWe present an efficient polymer-small molecule triple-tandem organic solar cell (OSC), consisting of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) bulk heterojunction as the first and second cells, and small molecules copper phthalocyanine (CuPc) and fullerene (C60) as the third cell on top. These sub-cells are connected by an intermediate layer of Al(1 nm)/MoO3(15 nm), which appears to be highly transparent, structurally smooth, and electrically functional. Compared to our previous all polymer triple-tandem organic solar cells (2.03%), this polymer-small molecule triple-tandem organic solar cell achieves an improved power conversion efficiency of 2.18% with a short-circuit current density (Jsc) = 3.02 mA/cm2, open-circuit voltage (Voc) = 1.51 V, and fill factor (FF) = 47.7% under simulated solar irradiation of 100 mW/cm2 (AM1.5G), which can be attributed to the increased photocurrent generation in the third cell since the third cell has the complementary absorption with two bottom cells despite a slightly reduced Voc.

Simultaneously increasing open-circuit voltage and short-circuit current to minimize the energy loss in organic solar cells via designing asymmetrical non-fullerene acceptor

2019 ◽  
Vol 7 (18) ◽  
pp. 11053-11061 ◽  
Author(s):  
Wei Gao ◽  
Tao Liu ◽  
Jiewei Li ◽  
Yiqun Xiao ◽  
Guangye Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit

Asymmetrical a-BTTIC simultaneously increases the open-circuit voltage and short-circuit current, and boosts the efficiency of OSCs with energy loss lower than 0.6 eV.

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.

Narrow band-gap materials with overlapping absorption simultaneously increase the open circuit voltage and average visible transmittance of semitransparent organic solar cells

2021 ◽  
Author(s):  
Xuexiang Huang ◽  
Jiyeon Oh ◽  
Yujun Cheng ◽  
Bin Huang ◽  
Shanshan Ding ◽  
...  
Keyword(s):  
Organic Solar Cells ◽  
Near Infrared ◽  
Open Circuit Voltage ◽  
Narrow Band ◽  
Short Circuit ◽  
Power Conversion ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Visible Transmittance

Overlapping near-infrared absorption not only does not reduce short-circuit current density (JSC), but also can ensure a high average visible transmittance (AVT) and get a high open-circuit voltage (VOC) and power conversion efficiency (PCE) at the same time.

scholarly journals Precise fluorination of polymeric donors towards efficient non-fullerene organic solar cells with enhanced open circuit voltage, short circuit current and fill factor

2021 ◽  
Author(s):  
Xiaosha Wang ◽  
Honggang Chen ◽  
Jun Yuan ◽  
Qingya Wei ◽  
Jing Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Chemical Structures ◽  
Similar Chemical

Three polymer donors named Qx-8F, Qx-10F, and Qx-12F, with similar chemical structures, was synthesized. The energy level of these donors is manipulated by precisely controlling the fluorination sites. We demonstrate...

scholarly journals Impact of Symmetry-Breaking of Non-Fullerene Acceptors for Efficient and Stable Organic Solar Cells

2021 ◽  
Author(s):  
Peddaboodi Gopikrishna ◽  
Huijeong Choi ◽  
Do Hui Kim ◽  
Jun Ho Hwang ◽  
Youngwan Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Symmetry Breaking ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit

The concurrent enhancement of the short-circuit current (JSC) and open-circuit voltage (VOC) is a key problem in the preparation of efficient organic solar cells (OSCs). In this paper, we report...

Sign in / Sign up

Export Citation Format

Share Document