Results 31 to 40 of about 4,308 (177)
Defect Dynamics and Solution‐Processed Interconnects in Perovskite‐Organic Tandem Solar Cells
Advanced Science, EarlyView.In this study, we identify the underlying cause of efficiency losses in WBG perovskites, which is ascribed to the presence of mobile defects distributed at surface regions. We further employ effective passivation agent with functional chemical groups to facilitate the healing of the mobile defects, thereby enhancing the VOC to 1.35 V and champion ...
Yingjie Hu +12 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2016 为解决独立光伏发电系统中太阳能转换效率低、蓄电池使用寿命短等问题，将最大功率点跟踪技术(MPPT)和蓄电池优化充放电控制策略应用到太阳能充电系统中.同时，应用以TL494为核心的推挽升压电路，降低系统对太阳光的依赖性，在没有太阳光时，系统由储存的蓄电池能量通过升压电路给负载供电.据此设计了一种以Atmega 88单片机为核心，由DC-DC充电变换器和蓄电池升压电路组成的直流电源.实验结果表明，采用MPPT充电方式可以实现对蓄电池充放电的优化管理，其平均充电效率达到了91.24%，延长了蓄电池的使用寿命 ...
WANGXiumin(王秀敏) +4 more
doaj +1 more source
A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT
Energies, 2020 Maximum Power Point Tracking (MPPT) control is an essential part of every photovoltaic (PV) system, in order to overcome any change in ambient environmental conditions and ensure operation at maximum power.. Recently, micro-inverters have gained a lot of
Omar Abdel-Rahim +5 more
doaj +1 more source
MPPT Based Solar String Inverter
International Journal for Research in Applied Science and Engineering Technology, 2023 Abstract: In this paper, we present an MPPT The MPPT-based solar inverter we offer in this study assures that the solar array produces its maximum output. The circuit's functionality allows it to A Highly Efficient MPPT (Maximum Power Point Tracking) Solar Inverter is what this effort tries to build.
Pranay Thakur +3 more
openaire +1 more source
Advanced Science, EarlyView.High‐bromide wide‐bandgap perovskites suffer from defects and phase segregation, limiting tandem performance. We report a bulk–surface coupling effect to heal lattice/surface defects and suppress halide migration. As a result, the wide‐bandgap device achieves 23.71% efficiency, while monolithic Si‐based tandems reach 32.26%, exhibiting exceptional long‐
Yu Tong +8 more
wiley +1 more source
Advanced Science, EarlyView.The redox‐active nature of NiOx enables ultrafast oxidative doping of spiro‐OMeTAD within seconds. Concurrently, NiOx‐Li+ coordination complexes formed during this redox process are selectively removed by filtration, effectively extracting residual Li+ ions from the film.
Yun Seop Shin +19 more
wiley +1 more source
Advanced Science, EarlyView.A synergistic methanol and oxalic acid interface engineering strategy is developed for PbS quantum dot solar cells. This approach transforms the PEDOT:PSS layer into a dense, electronically uniform, and conductive network. Consequently, the device achieves a record‐low voltage deficit of 340 mV, yielding a remarkable Voc of 742 mV and a power ...
Shengkai Kang +11 more
wiley +1 more source
Jurnal Elkomika, 2022 ABSTRAK Perubahan laju aliran air pada pembangkit listrik pikohidro dapat menyebabkan daya dan tegangan yang dihasilkan generator menjadi tidak stabil. Penelitian ini bertujuan untuk merancang Maximum Power Point Tracking (MPPT) dengan algoritma logika ...
SOFIAN YAHYA +3 more
doaj +1 more source
Current Sensorless Based on PI MPPT Algorithms
Sensors, 2023 This paper presents novel current sensorless maximum-power point-tracking (MPPT) algorithms based on compensators/controllers and a single-input voltage sensor. The proposed MPPTs eliminate the expensive and noisy current sensor, which can significantly reduce the system cost and retain the advantages of the widely used MPPT algorithms, such as ...
Moacyr A. G. de Brito +4 more
openaire +3 more sources
Advanced Energy Materials, EarlyView.Halide segregation (HS) in mixed‐halide wide‐bandgap (WBG) perovskites is key to the stability of perovskite‐based tandem cells and a central focus of large‐scale research efforts. Here, we find that the underlying reason for the poor stability of cells prone to HS is enhanced ionic losses during operation. Furthermore, we identified irreversible ionic
Nikhil Kalasariya +24 more
wiley +1 more source