Enhanced efficiency and current density of solar cells via energy-down-shift having energy-tuning-effect of highly UV-light-harvesting Mn2+-doped quantum dots

Nano Energy ◽  
2017 ◽  
Vol 33 ◽  
pp. 257-265 ◽  
Author(s):  
Mohammed Jalalah ◽  
Yun-Hyuk Ko ◽  
Farid A. Harraz ◽  
M.S. Al-Assiri ◽  
Jea-Gun Park
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Current Density ◽  
Light Harvesting ◽  
Uv Light ◽  
Doped Quantum Dots ◽  
Energy Tuning

scholarly journals PMMA Thin Film with Embedded Carbon Quantum Dots for Post-Fabrication Improvement of Light Harvesting in Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 291 ◽  
Author(s):  
Askar A. Maxim ◽  
Shynggys N. Sadyk ◽  
Damir Aidarkhanov ◽  
Charles Surya ◽  
Annie Ng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Fill Factor ◽  
Light Harvesting ◽  
Incident Light ◽  
Perovskite Solar Cells ◽  
Carbon Quantum Dots ◽  
Active Layers ◽  
Before And After ◽  
Down Conversion

Perovskite solar cells (PSCs) with a standard sandwich structure suffer from optical transmission losses due to the substrate and its active layers. Developing strategies for compensating for the losses in light harvesting is of significant importance to achieving a further enhancement in device efficiencies. In this work, the down-conversion effect of carbon quantum dots (CQDs) was employed to convert the UV fraction of the incident light into visible light. For this, thin films of poly(methyl methacrylate) with embedded carbon quantum dots (CQD@PMMA) were deposited on the illumination side of PSCs. Analysis of the device performances before and after application of CQD@PMMA photoactive functional film on PSCs revealed that the devices with the coating showed an improved photocurrent and fill factor, resulting in higher device efficiency.

scholarly journals The effect of gold quantum dots/grating-coupled surface plasmons in inverted organic solar cells

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Kulrisa Kuntamung ◽  
Patrawadee Yaiwong ◽  
Chutiparn Lertvachirapaiboon ◽  
Ryousuke Ishikawa ◽  
Kazunari Shinbo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Uv Light ◽  
Short Circuit ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Management Approach ◽  
Near Ultraviolet

We studied the effect of gold quantum dots (AuQDs)/grating-coupled surface plasmon resonance (GC-SPR) in inverted organic solar cells (OSCs). AuQDs are located within a GC-SPR evanescent field in inverted OSCs, indicating an interaction between GC-SPR and AuQDs' quantum effects, subsequently giving rise to improvement in the performance of inverted OSCs. The fabricated solar cell device comprises an ITO/TiO 2 /P3HT : PCBM/PEDOT : PSS : AuQD/silver grating structure. The AuQDs were loaded into a hole transport layer (PEDOT : PSS) of the inverted OSCs to increase absorption in the near-ultraviolet (UV) light region and to emit visible light into the neighbouring photoactive layer, thereby achieving light-harvesting improvement of the device. The grating structures were fabricated on P3HT:PCBM layers using a nanoimprinting technique to induce GC-SPR within the inverted OSCs. The AuQDs incorporated within the strongly enhanced GC-SPR evanescent electric field on metallic nanostructures in the inverted OSCs improved the short-circuit current and the efficiency of photovoltaic devices. In comparison with the reference OSC and OSCs with only green AuQDs or only metallic grating, the developed device indicates enhancement of up to 16% power conversion efficiency. This indicates that our light management approach allows for greater light utilization of the OSCs because of the synergistic effect of G-AuQDs and GC-SPR.

Light harvesting enhancement upon incorporating alloy structured CdSeXTe1−X quantum dots in DPP:PC61BM bulk heterojunction solar cells

2017 ◽  
Vol 5 (3) ◽  
pp. 654-662 ◽  
Author(s):  
Rezvan Soltani ◽  
Ali Asghar Katbab ◽  
Kerstin Schaumberger ◽  
Nicola Gasparini ◽  
Christoph J. Brabec ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Light Harvesting ◽  
Bulk Heterojunction ◽  
Charge Generation ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

PCE is improved owing to the enhanced JSC, resulting from larger light harvesting and higher charge generation.

scholarly journals Investigation into the current loss in InAs/GaAs quantum dot solar cells with Si-doped quantum dots

2019 ◽  
Vol 52 (50) ◽  
pp. 505108
Author(s):  
Shun Chan ◽  
Dongyoung Kim ◽  
Mingchu Tang ◽  
Xiao Li ◽  
Huiyun Liu
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Current Loss ◽  
Quantum Dot Solar Cells ◽  
Doped Quantum Dots ◽  
Si Doped ◽  
Gaas Quantum Dot

scholarly journals Photoacoustic Study of CdS QDs for Application in Quantum-Dot-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
S. Abdallah ◽  
N. Al-Hosiny ◽  
Ali Badawi
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Solar Cells ◽  
Current Density ◽  
Cds Quantum Dots ◽  
Counter Electrodes ◽  
Redox Species ◽  
Cds Qds ◽  
Photovoltaic Characterization ◽  
Sensitized Solar Cells

The optical properties and photovoltaic characterization of CdS quantum dots sensitized solar cells (QDSSCs) were studied. CdS QDs were prepared by the chemical solution deposition (CD) technique. Photoacoustic spectroscopy (PA) was employed to study the optical properties of the prepared samples. The sizes of the CdS QDs were estimated from transmission electron microscope (TEM) micrographs gives radii ranged from 1.57 to 1.92 nm. The current density-voltage (J-V) characteristic curves of the assembled QDSSCs were measured. Fluorine doped Tin Oxide (FTO) substrates were coated with 20 nm-diameter TiO2nanoparticles (NPs). Presynthesized colloidal CdS quantum dots of different particles size were deposited on the TiO2-coated substrates using direct adsorption (DA) method. The FTO counter electrodes were coated with platinum, while the electroelectrolyte containingI-/I-3redox species was sandwiched between the two electrodes. The short current density (Jsc) and efficiency (η) increases as the particle size increases. The values ofJscincreases linearly with increasing the intensities of the sun light which indicates the greater sensitivity of the assembled cells.

scholarly journals PREPARED QUANTUM DOTS SENSITIZED SOLAR CELLS BASED ON TiO2/CdS:Mn2+/CdSe PHOTOANODE

2018 ◽  
Vol 34 (3) ◽  
Author(s):  
Ha Thanh Tung
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Solar Cells ◽  
Doping Concentration ◽  
Light Harvesting ◽  
Sensitized Solar Cells

In this study, we have prepared and investigated the optical properties of the TiO2/CdS:Mn2+/CdSe photoanode as the function of Mn2+ doping concentration and thickness. The results show that the peaks of the UV-Vis spectra shifted toward longer wavelength while Mn2+ doping concentrations or thickness of the films were changed. The main cause of the red-shifting in UV-Vis spectra may come from the increasing of photoanode light-harvesting capacity. In addition, the results also demonstrated by the boosting performance of quantum dots sensitized solar cells from 2.07% for TiO2/CdS/CdSe photoanode to 2.5% for TiO2/CdS:Mn2+/CdSe photoanode.

scholarly journals All-inorganic perovskite quantum dots as light-harvesting, interfacial, and light converting layers toward solar cells

2021 ◽  
Author(s):  
Leimeng Xu ◽  
Shichen Yuan ◽  
Le Ma ◽  
Baisong Zhang ◽  
Fang Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Light Harvesting ◽  
Low Cost ◽  
Next Generation ◽  
Solution Processed ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Lead Halide

Solution-processed colloidal lead halide perovskite quantum dots (QDs) are considered as one of the promising candidates for the next-generation photovoltaics (PVs) due to the excellent optoelectronic properties and low-cost synthetic...

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