Efficiency Enhancement in Hybrid P3HT/Silicon Nanocrystal Solar Cells

Green ◽  
2011 ◽  
Vol 1 (4) ◽  
Author(s):  
Sabrina Niesar ◽  
Wolfgang Fabian ◽  
Nils Petermann ◽  
Daniel Herrmann ◽  
Eberhard Riedle ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Microwave Plasma ◽  
Weight Ratio ◽  
Charge Trapping ◽  
Open Circuit ◽  
Cell Performance ◽  
Strong Impact ◽  
Plasma Synthesis ◽  
Solar Cell Performance

AbstractHybrid organic-inorganic solar cells from poly(3-hexylthiophene) (P3HT) and freestanding silicon nanocrystals (Si-ncs) combine the advantages of silicon-based photovoltaics with the cost-efficient solution processing technique. At present, the microwave-plasma synthesis of Si-ncs that allows for a future upscaling to industrial demands is at the expense of the Si-nc surface quality and the number of charge-trapping defects. Here, we present an enhancement of the solar cell performance by identifying the major factors which are limiting the device efficiency. With the help of low-cost post-growth treatments of the Si-ncs and the optimization of various device parameters, P3HT:Si-ncs bulk heterojunction solar cells with an efficiency up to 1.1% are achieved. In particular, etching of the Si-ncs with hydrofluoric acid to remove the surface oxide shells and surface defects has a strong impact on the solar cell performance. An intermediate Si weight ratio of around 60% is found to lead to the highest current densities. For Si-ncs with very small diameters, an additional enhancement of the open circuit voltage was observed. Moreover, we show that the structural order of P3HT has a strong influence on the efficiency, which can be explained by an improved charge carrier separation at the P3HT/Si-ncs interface in combination with an enhanced charge transport in the P3HT phase.

Solar Cell Performance Under Different Illumination Conditions

2001 ◽  
Vol 664 ◽  
Author(s):  
Christian Gemmer ◽  
Markus B. Schubert
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Poor Performance ◽  
Electronic System ◽  
Open Circuit ◽  
Cell Performance ◽  
Superior Performance ◽  
Electronic Systems ◽  
Shunt Resistance ◽  
Solar Cell Performance

ABSTRACTWe numerically simulate performance data of hydrogenated amorphous silicon (a-Si:H) and copper indium gallium diselenide (CIGS) based solar cells for various illumination conditions. For ease of comparison, we model typical single junctions with the very same software. The study allows us to evaluate the cell feasibility in different hybrid electronic systems like smart cards, wrist watches, transponder systems, and mobile sensors. At an illumination intensity of 1 sun, the optical bandgap of the absorber material and the series resistances determine the spectral sensitivity of the solar cell to particular illumination spectra. For intensities of 10-2 suns and so-called D65 spectrum, which represents daylight under cloudy skies, the efficiency of a-Si:H solar cells nearly equates the CIGS cell performance although the AM 1.5 efficiency of the CIGS diode exceeds the one of our a-Si:H cell by more than a factorof two. Infrared-weighted black body radiation leads to superior performance of the CIGS type, whereas for ultraviolet-weighted illumination the a-Si:H cell shows better performance. For intensities below 10-4 suns theexternal shunt resistance dominates the current-voltage characteristics of both cell types, resulting in poor performance independent of the incident spectrum. We complete our study by simulating the solar-powered charging process of a gold capacitor, which serves us as a model for the energy storage within a hybrid electronic system. The charging behavior under various realistic illumination conditions shows particular cellcharacteristics: high open circuit voltages qualify a-Si:H solar cells for electronic systems that require increased voltages and CIGS cells are suited for applications with higher current need.

How do Buffer Layers Affect Solar Cell Performance and Solar Cell Stability?

2001 ◽  
Vol 668 ◽  
Author(s):  
Bolko von Roedern
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Carrier Transport ◽  
Open Circuit ◽  
Operating Conditions ◽  
Cell Performance ◽  
Buffer Layers ◽  
Limiting Current ◽  
Solar Cell Performance ◽  
A Cell

ABSTRACTBuffer layers are commonly used in the optimization of thin-film solar cells. For CuInSe2-and CdTe-based solar cells, multilayer transparent conductors (TCOs, e.g., ZnO or SnO2) are generally used in conjunction with a CdS heterojunction layer. Optimum cell performance is usually found when the TCO layer in contact with the CdS is very resistive or almost insulating. In addition to affecting the open-circuit voltage of a cell, it is commonly reported that buffer layers affect stress-induced degradation and transient phenomena in CdTe- and CuInSe2-based solar cells. In amorphous silicon solar cells, light-induced degradation has a recoverable and a nonrecoverable component too, and the details of the mechanism may depend on the p-type contact layer. Because of the similarity of transients and degradation in dissimilar material systems, it is suggested that degradation and recovery are driven by carriers rather than by diffusing atomic species. The question that must be addressed is why, not how, species diffuse and atomic configurations relax differently in the presence of excess carriers. In this paper, I suggest that the operating conditions of a cell can change the carrier transport properties. Often, excess carriers may enhance the conductance in localized regions (“filaments”) and buffer layers; limiting current flow into such filaments may therefore control the rate and amount of degradation (or recovery).

Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing

2014 ◽  
Vol 2 (45) ◽  
pp. 19282-19289 ◽  
Author(s):  
Zhenggang Huang ◽  
Elisa Collado Fregoso ◽  
Stoichko Dimitrov ◽  
Pabitra Shakya Tuladhar ◽  
Ying Woan Soon ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solar Cells ◽  
Solar Cell ◽  
Thermal Annealing ◽  
Bulk Heterojunction ◽  
Cell Performance ◽  
Polymer Molecular Weight ◽  
Solar Cell Performance ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

The performance of bulk heterojunction solar cells based on a novel donor polymer DPP-TT-T was optimised by tuning molecular weight and thermal annealing.

Synergistic improvements in the performance and stability of inverted planar MAPbI3-based perovskite solar cells incorporating benzylammonium halide salt additives

2021 ◽  
Author(s):  
Hung-Cheng Chen ◽  
Jie-Min Lan ◽  
Hsiang-Lin Hsu ◽  
Chia-Wei Li ◽  
Tien-Shou Shieh ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Solar Cells ◽  
Solar Cell ◽  
Surface Morphology ◽  
Perovskite Solar Cells ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Halide Salt

Three different benzylammonium halide (Cl, Br, and I) salts were investigated to elucidate their effects as additives on MAPbI3 perovskite surface morphology, crystal structure, optical properties, and solar cell performance and stability.

scholarly journals The effect of ZnO/ZnSe core/shell nanorod arrays photoelectrodes on PbS quantum dot sensitized solar cell performance

2020 ◽  
Vol 2 (1) ◽  
pp. 286-295 ◽  
Author(s):  
M. Kamruzzaman
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Quantum Dot ◽  
Cell Performance ◽  
Core Shell ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Solar Cell Performance ◽  
Sensitized Solar Cells ◽  
Pbs Quantum Dot

ZnO nanorod (NR) based inorganic quantum dot sensitized solar cells have gained tremendous attention for use in next generation solar cells.

scholarly journals Improving the all-polymer solar cell performance by adding a narrow bandgap polymer as the second donor

RSC Advances ◽  
2020 ◽  
Vol 10 (63) ◽  
pp. 38344-38350
Author(s):  
Kai Wang ◽  
Sheng Dong ◽  
Xudong Chen ◽  
Ping Zhou ◽  
Kai Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Polymer Solar Cell ◽  
Polymer Solar Cells ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Narrow Bandgap

Ternary all-polymer solar cells are fabricated using an N2200 acceptor and two donor polymers (PF2 and PM2) with complementary absorption.

Improvement of D–π–A organic dye-based dye-sensitized solar cell performance by simple triphenylamine donor substitutions on the π-linker of the dye

2017 ◽  
Vol 1 (6) ◽  
pp. 1059-1072 ◽  
Author(s):  
N. Prachumrak ◽  
T. Sudyoadsuk ◽  
A. Thangthong ◽  
P. Nalaoh ◽  
S. Jungsuttiwong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Dye Sensitized Solar Cells ◽  
Organic Dye ◽  
Cell Performance ◽  
Dye Sensitized Solar Cell ◽  
Solar Cell Performance ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Three new D–π–A dyes containing different numbers of triphenylamine donor substitutions on a π-linker were synthesized for dye-sensitized solar cells.

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