We report the effect of a disperse carbon interlayer between the n-a-Si:H layer and an aluminium zinc oxide (AZO) back contact on the performance of amorphous silicon solar cells. Carbon was incorporated to the AZO film as revealed by x-ray photoelectron spectroscopy and energy-dispersive x-ray analysis. Solar cells fabricated on glass substrates using AZO in the back contact performed better w...

In this study, poly(3,3-dibenzyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine)/platinum composite films (PProDOT-Bz2/Pt) were used as counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). The composite films were prepared on fluorine-doped tin oxide (FTO) glass by radio frequency (RF) sputtering to deposit platinum (Pt) for 30 s. Afterwards, PProDOT-Bz2 was deposited on the Pt–FTO glass...

Alcohol soluble titanium chelate TIPD (titanium (diisopropoxide) bis(2,4-pentanedionate)) was used as an electron transporting layer to form an ohmic contact with the negative electrode, aiming to enhance the charge extraction and suppress the charge recombination for high performance CH3NH3PbI3/PCBM-based PHJ perovskite solar cells. The TIPD layer shows excellent suitability to CH3NH3PbI3 pero...

A new technique to determine the current-voltage characteristics of solar cells based on simultaneously measuring the open-circuit voltage as a function of a slowly varying light intensity has been proposed recently (Sinton and Cuevas, 2000). This paper presents a detailed theoretical analysis and interpretation of such quasisteady-state Voc measurements (QssVoc). The ability of this analysis t...

Deduce the no-load (open-circuit) voltage Voc across the terminals of a short, center-fed linear dipole antenna of half height h when excited by a plane wave of wavelength λ h whose electric field vector Ein is parallel to the dipole antenna. The ratio Heff = |Voc/Ein| is called the effective height of the antenna. Also deduce the current Isc that would flow between the terminals if they were s...

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...

In this study, we analyze the degradation behavior of conventional polymeric solar cells
 (PSCs) under constant indoor light illumination. A LED lamp with a color temperature 2700 K, was used for illumination conditions. We compare results obtained encapsulated and non-encapsulated devices. The performance PTB7:PC70BM-based cell showed an initial maximum power conversion efficiency (PCE) 1...

In this work, the effect of some parameters on tin-based perovskite (CH3NH3SnI3) solar cell were studied through device simulation with respect to adjusting doping concentration absorption layer, its thickness and electron affinities transport medium hole medium, as well defect density layer mobility material (HTM). A simulator; one-dimensional Solar Cells Capacitance Simulator (SCAPS‑1D) progr...

This paper presents the design of a low-power voltage reference, bias current and the supply voltage for a 9-bit fully differential ADC. The references, power supply circuits and the ADC are integrated in one circuit, i.e. chip. The proposed chip is implemented in the UMC 0.18 μm CMOS process and occupies 800×700 μm. The circuit supply voltage V DD is obtained from the external RF signal. When ...