scholarly journals Fast cascade neutralization of an oxidized sensitizer by an in situ-generated ionic layer of I− species on a nanocrystalline TiO2 electrode

2014 ◽  
Vol 7 (12) ◽  
pp. 4029-4034 ◽  
Author(s):  
Jongchul Lim ◽  
Taewan Kim ◽  
Taiho Park
Keyword(s):  
Power Conversion ◽  
Tio2 Electrode ◽  
Nanocrystalline Tio2 ◽  
Higher Power ◽  
Dye Loading ◽  
Neutralization Rate ◽  
Recombination Reactions ◽  
Ionic Layer ◽  
Conventional Device

A novel coadsorbent including three terminal double bonds reacted with I2 and generated ionic complexes on the surface of TiO2. The in situ-generated ionic layer accelerated the neutralization rate of dye+ and decreased the recombination reactions with dye+ and I3− due to coadsorbent effects, resulting in 22% higher power conversion efficiency, even at 15% low dye loading, compared to the conventional device.

scholarly journals Efficient Inverted Solar Cells Using Benzotriazole-Based Small Molecule and Polymers

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 393
Author(s):  
Ja Eun Lee ◽  
Yoon Kim ◽  
Yang Ho Na ◽  
Nam Seob Baek ◽  
Jae Woong Jung ◽  
...  
Keyword(s):  
Solar Cell ◽  
Conjugated Polymers ◽  
Power Conversion ◽  
High Energy ◽  
Photovoltaic Properties ◽  
Device Structures ◽  
Donor Acceptor ◽  
Medium Band ◽  
Inverted Solar Cell ◽  
Conventional Device

We synthesized medium-band-gap donor-acceptor (D-A) -type conjugated polymers (PBTZCZ-L and PBTZCZ-H) consisting of a benzotriazole building block as an acceptor and a carbazole unit as a donor. In comparison with the polymers, a small conjugated molecule (BTZCZ-2) was developed, and its structural, thermal, optical, and photovoltaic properties were investigated. The power conversion efficiency (PCE) of the BTZCZ-2-based solar cell devices was less than 0.5%, considerably lower than those of polymer-based devices with conventional device structures. However, inverted solar cell devices configured with glass/ITO/ZnO:PEIE/BTZCZ-2:PC71BM/MoO3/Ag showed a tremendously improved efficiency (PCE: 5.05%, Jsc: 9.95 mA/cm2, Voc: 0.89 V, and FF: 57.0%). We believe that this is attributed to high energy transfer and excellent film morphologies.

Effect of the π-linker on the performance of organic photovoltaic devices based on push–pull D–π–A molecules

2018 ◽  
Vol 42 (14) ◽  
pp. 11458-11464 ◽  
Author(s):  
Hong Chul Lim ◽  
Jang-Joo Kim ◽  
Jyongsik Jang ◽  
Jong-In Hong
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Higher Power

The bulk heterojunction organic photovoltaic (OPV) devices based on 3T : PC71BM (2 wt%, 1 : 1.75 w/w) exhibited a higher power conversion efficiency of 2.58% than DTT-based OPV devices.

scholarly journals Design and Optimization of Supercapacitor Hybrid Architecture for Power Supply-Connected Batteries Lifetime Enhancement

Electronics ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 41
Author(s):  
Jaemin Kim ◽  
Donghwa Shin ◽  
Donkyu Baek ◽  
Jaehyun Park
Keyword(s):  
Design Methodology ◽  
Power Conversion ◽  
Average Power ◽  
Hybrid Architecture ◽  
Power Demand ◽  
Design And Optimization ◽  
Notebook Computers ◽  
Ac Power ◽  
Higher Power ◽  
Array Structure

AC power adapters for battery-operated systems, such as smartphones and notebook computers, not only supply run-time power to operate the devices but also charge the built-in batteries. The capacity of the adapter is optimized for the average power demand rather than the maximum power demand to reduce the size and weight of the adapter. Such a reduced capacity adapter may cause the battery to age even when the device is operated with the power adapter while under higher power demand, which is different from the expectation of most users. A recent study proposed a supercapacitor assist architecture to reduce the battery aging when the battery is powered by the adapter. However, the previous work only shows the potential of the architecture. In this work, we propose a design methodology to find the optimal setup for the supercapacitor hybrid architecture considering supercapacitor array structure and power conversion efficiency. The results show that a supercapacitor having 17.5 mF capacity and 20 V withstand voltage is enough to supply the deficient energy of a reduced capacity power adapter.

scholarly journals The role of connectivity in significant bandgap narrowing for fused-pyrene based non-fullerene acceptors toward high-efficiency organic solar cells

2020 ◽  
Vol 8 (12) ◽  
pp. 5995-6003 ◽  
Author(s):  
Shungang Liu ◽  
Wenyan Su ◽  
Xianshao Zou ◽  
Xiaoyan Du ◽  
Jiamin Cao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Power Conversion ◽  
Structural Isomer ◽  
Bandgap Narrowing ◽  
Higher Power

Isomers of non-fullerene acceptors with pyrene as cores but fused at different positions were studied. FPIC6 possessed ∼119 nm of red-shift absorption and much higher power conversion efficiency of 11.55% as compared to its structural isomer FPIC5.

Chlorine-doped SnO2 hydrophobic surfaces for large grain perovskite solar cells

2020 ◽  
Vol 8 (33) ◽  
pp. 11638-11646 ◽  
Author(s):  
Wenxiao Gong ◽  
Heng Guo ◽  
Haiyan Zhang ◽  
Jian Yang ◽  
Haiyuan Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Tin Oxide ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Higher Power

Both wetting and non-wetting tin oxide SnO2 were spin-coated and the non-wetting electron transport layer demonstrated a larger perovskite and higher power conversion efficiency.

scholarly journals In situ spectroelectrochemical and theoretical study on the oxidation of a 4H-imidazole-ruthenium dye adsorbed on nanocrystalline TiO2 thin film electrodes

2015 ◽  
Vol 17 (44) ◽  
pp. 29637-29646 ◽  
Author(s):  
Ying Zhang ◽  
Stephan Kupfer ◽  
Linda Zedler ◽  
Julian Schindler ◽  
Thomas Bocklitz ◽  
...  
Keyword(s):  
Thin Film ◽  
Charge Transfer ◽  
Tio2 Thin Film ◽  
Theoretical Study ◽  
Ruthenium Complexes ◽  
Wavelength Dependence ◽  
Nanocrystalline Tio2 ◽  
Thin Film Electrodes ◽  
Ruthenium Dye

A pronounced wavelength dependence of charge transfer character is observed, indicating that these 4H-imidazole-ruthenium complexes are potential multi-photoelectron donors.

Efficient charge transfer and utilization of near-infrared solar spectrum by ytterbium and thulium codoped gadolinium molybdate (Gd2(MoO4)3:Yb/Tm) nanophosphor in hybrid solar cells

2016 ◽  
Vol 18 (44) ◽  
pp. 30837-30844
Author(s):  
Weifu Sun ◽  
Zihan Chen ◽  
Qin Zhang ◽  
Junli Zhou ◽  
Feng Li ◽  
...  
Keyword(s):  
Solar Cell ◽  
Near Infrared ◽  
Power Conversion ◽  
Solar Spectrum ◽  
The Novel ◽  
Hybrid Solar Cells ◽  
Higher Power ◽  
Efficient Charge ◽  
Gadolinium Molybdate ◽  
Novel Design

The novel design of incorporation of Gd2(MoO4)3 into TiO2 film leads to the enhanced charge transport and higher power conversion efficiency of hybrid solar cell.

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