نتایج جستجو برای: open circuit voltage

تعداد نتایج: 589873  

2011
Kirk T. McDonald Joseph Henry

Consider any two antennas, labeled A and B, that can be operated as two-terminal devices. If antenna B is used as a receiver, the open-circuit (no load) voltage V oc B induced across its terminals by the radiation from antenna A with drive current IA (between its terminals) is related to the open-circuit voltage V ′oc A induced across the terminals of antenna A (when used as a receiver) by the ...

2016
Haijun Bin Liang Gao Zhi-Guo Zhang Yankang Yang Yindong Zhang Chunfeng Zhang Shanshan Chen Lingwei Xue Changduk Yang Min Xiao Yongfang Li

Simutaneously high open circuit voltage and high short circuit current density is a big challenge for achieving high efficiency polymer solar cells due to the excitonic nature of organic semdonductors. Herein, we developed a trialkylsilyl substituted 2D-conjugated polymer with the highest occupied molecular orbital level down-shifted by Si-C bond interaction. The polymer solar cells obtained by...

Journal: :Physical chemistry chemical physics : PCCP 2014
Huidong Zang Yu-Che Hsiao Bin Hu

The accumulation of dissociated charge carriers plays an important role in reducing the loss occurring in organic solar cells. We find from light-assisted capacitance measurements that the charge accumulation inevitably occurred at the electrode and photovoltaic layer interface for bulk-heterojunction ITO/PEDOT:PSS/P3HT:PCBM/Ca/Al solar cells. Our results indicate, for the first time through im...

Journal: :Physical chemistry chemical physics : PCCP 2012
Kaja C Deing Ulrich Mayerhöffer Frank Würthner Klaus Meerholz

In this study, we investigated bulk-heterojunction solar cells composed of PC(61)BM and squaraine dyes with different donor subunits. Both, H- and J-aggregates, have been observed for the squaraine dyes in the mixture, even for the same dye depending on the annealing conditions of the blends. Supramolecular organization of the squaraine dyes noticeably affects solar cell performance. The J-aggr...

2002
M H Miller

Objective Preferably (in general) electronic circuitry is energized from a voltage source, i.e., a source for which ideally no current flows under open-circuit conditions. Absent the need to maintain the load current stand-by power dissipation will be minimal. In addition a DC (unipolar constant voltage) power supply virtually always is preferable over an AC supply for electronic equipment. An ...

Power gating technique reduces leakage power in the circuit. However, power gating leads to large voltage fluctuation on the power rail during power gating mode to active mode due to the package inductance in the Printed Circuit Board. This voltage fluctuation may cause unwanted transitions in neighboring circuits. In this work, a power gating architecture is developed for minimizing power in a...

Journal: :Journal of the American Chemical Society 2006
Kristin L Mutolo Elizabeth I Mayo Barry P Rand Stephen R Forrest Mark E Thompson

A double-heterostructure boron subphthalocyanine chloride (SubPc)/C60 thin-film photovoltaic cell exhibits a more than doubled Voc compared to a conventional copper phthalocyanine (CuPc)/C60 cell under 1 sun AM1.5G simulated illumination. The lower oxidation potential of SubPc results in an increase in the energy difference between the lowest unoccupied molecular orbital of the acceptor-like ma...

Climatic conditions affect the performance of photovoltaic panels. In this study, the effect of ambient air temperature and relative humidity on the performance parameters of two types of silicon photovoltaic solar panels, including mono-crystalline silicon (mc-Si) and polycrystalline silicon (pc-Si), were studied in the laboratory scale. The experiments were carried out by the performance test...

2000
L. Jiang J. H. Lyou S. Rane E. A. Schiff Q. Wang Q. Yuan

We have performed computer calculations to explore effects of the p/i interface on the opencircuit voltage in a-Si:H based pin solar cells. The principal conclusions are that interface limitation can occur for values of VOC significantly below the built-in potential VBI of a cell, and that the effects can be understood in terms of thermionic emission of electrons from the intrinsic layer into t...

2009
Hsiang-Yu Chen Jianhui Hou Shaoqing Zhang Yongye Liang Guanwen Yang Yang Yang Luping Yu Yue Wu Gang Li

Following the development of the bulk heterojunction1 structure, recent years have seen a dramatic improvement in the efficiency of polymer solar cells. Maximizing the open-circuit voltage in a low-bandgap polymer is one of the critical factors towards enabling high-efficiency solar cells. Study of the relation between open-circuit voltage and the energy levels of the donor/acceptor2 in bulk he...

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