Floating-Gate Transistor Photodetector

A field effect transistor photodetector that can operate in room temperature includes a source electrode , a drain electrode , a channel to allow an electric current to flow between the drain and source electrodes , and a gate electrode to receive a bias voltage for controlling the current in the channel . The photodetector includes a light - absorbing mate rial that absorbs light and traps electric charges . The light absorbing material is configured to generate one or more charges upon absorbing light having a wavelength within a specified range and to hold the one or more charges . The one or more charges held in the light - absorbing material reduces the current flowing through the channel

FLOATING-GATE TRANSISTOR PHOTODETECTOR WITH LIGHT ABSORBING LAYER

A field effect transistor photodetector that can operate in room temperature includes a source electrode, a drain electrode, a channel to allow an electric current to flow between the drain and source electrodes, and a gate electrode to receive a bias voltage for controlling the current in the channel. The photodetector includes a light-absorbing material that absorbs light and traps electric charges. The light-absorbing material is configured to generate one or more charges upon absorbing light having a wavelength within a specified range and to hold the one or more charges. The one or more charges held in the light-absorbing material reduces the current flowing through the channel

Method for Increasing the Efficiency of Organic Photovoltaic Cells

The present invention is directed to an organic photovoltaic cell that contains one or more dipole regions generally disposed between an organic active region and the electrodes and a process for producing such an organic photovoltaic cell

Achieving high efficiency laminated polymer solar cell with interfacial modified metallic electrode and pressure induced crystallization

We report efficient laminated organic photovoltaic device with efficiency approach the optimized device by regular method based on Poly(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The high efficiency is mainly attributed to the formation of a concrete polymer/metal interface mechanically and electrically by the use of electronic-glue, and using the highly conductive and flexible silver film as anode to reduce photovoltage loss and modifying its work function for efficiency hole extraction by ultraviolet/ozone treatment, and the pressure induced crystallization of PCBM

Urinary iodine and serum 25-hydroxyvitamin D are associated with depression in adolescents

Purpose: To determine whether depressive disorder (DD) in adolescents is associated with the levels of serum 25-hydroxyvitamin D {25(OH)D} and urinary iodine.Methods: A total of 270 adolescent participants from 8 to 16 years old were enrolled in this study (male, n = 125; female, n = 145). Of these, 160 paticipants (male, n = 75; female, n = 85) were diagnosed with DD and 110 paticipants (male, n = 50; female, n = 60) were non-DD. Urinary iodine level, serum 25(OH)D level, and thyroid function were measured and adjusted for sex, age, body mass index, and disease progression. Vitamin D (25(OH)D) < 15 ng/mL was considered as VD deficiency, and iodine <100 μg/L was viewed as iodine deficiency. Mean VD and iodine levels were compared between DD and control groups.Results: DD patients had lower concentrations of 25(OH)D3 (p < 0.005) and urinary iodine (p < 0.05) than non-DD control, in both male and female cohorts. However, serum 25(OH)D2 concentration did not significantly correlate with depressive symptoms.Conclusion: Adolescents with DD have markedly lower serum 25(OH)D concentrations and urinary iodine levels than control patients. This relationship is positively associated with disease progression, suggesting possible nutritional intervention measures for neuroprotection.Keywords: 25-Hydroxyvitamin D, Iodine, Adolescence, Depressio

Intermediate Layers in Tandem Organic Solar Cells

Tandem structures can boost the efficiency of organic solar cell to more than 15%, compared to the 10% limit of single layer bulk heterojunction devices. Design and fabricating of intermediate layers plays a very important role to achieve high device performance. This article will review the main experimental progresses of tandem organic solar cells, and focus on the intermediate layers (charge recombination layers) in both thermal evaporated and solution processed organic tandem solar cell devices

Achieving high efficiency laminated polymer solar cell with interfacial modified metallic electrode and pressure induced crystallization

We report efficient laminated organic photovoltaic device with efficiency approach the optimized device by regular method based on Poly(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The high efficiency is mainly attributed to the formation of a concrete polymer/metal interface mechanically and electrically by the use of electronic-glue, and using the highly conductive and flexible silver film as anode to reduce photovoltage loss and modifying its work function for efficiency hole extraction by ultraviolet/ozone treatment, and the pressure induced crystallization of PCBM

Intermediate Layers in Tandem Organic Solar Cells

Tandem structures can boost the efficiency of organic solar cell to more than 15%, compared to the 10% limit of single layer bulk heterojunction devices. Design and fabricating of intermediate layers plays a very important role to achieve high device performance. This article will review the main experimental progresses of tandem organic solar cells, and focus on the intermediate layers (charge recombination layers) in both thermal evaporated and solution processed organic tandem solar cell devices

Diagnostics of reciprocating compressor fault based on a new envelope algorithm of empirical mode decomposition

Empirical mode decomposition (EMD), a self-adaptive time-frequency analysis methodology, is particularly suitable for processing the nonlinear and non-stationary time series, which can decompose a complicated signal into a series of intrinsic mode functions. Although it has the attractive features, the approach to construct the envelop-line in EMD has obvious shortcomings. A suggested improvement to EMD by adopting the optimized rational Hermite interpolation is proposed in this paper. In the proposed method, it adopts rational Hermite interpolation to compute the envelope-line, which has a shape controlling parameter compared with the cubic Hermite interpolation. In the meantime, one parameter determining criterion is introduced to guarantee the shape controlling parameter selection performs optimally. Besides the empirical envelope demodulation (EED) is introduced and utilized to analyze the IMFs derived from the improved EMD method. Hence, a new time-frequency method based on the optimized rational Hermite-based EMD combined with EED is proposed and the effectiveness was validated by the numerical simulations and an application to the reciprocating compressor fault diagnosis. The contributions of this paper are three aspects: Firstly, the definition of the best envelope is non-existent, some light is given about which envelope maybe better in this paper. Secondly, the optimal shape controlling parameter selection combined with rational Hermite interpolation is developed, leading to the significant performance enhancement. Thirdly, little research has been carried out on the fault diagnosis of the reciprocating compressor using EMD, the proposed method is a good start