Dark current of organic cells
In this work, we report a self-powered s-OPD with a simple fabrication structure used for organic solar cells and a detectivity of more than 1 × 10 12 Jones (corrected by noise current) in the NIR region at 10% tensile strain and short response time (2.46 μs), representing state-of-the-art performances. Reducing energetic disorders other …
High stability of dark current enables stretchable near-infrared …
In this work, we report a self-powered s-OPD with a simple fabrication structure used for organic solar cells and a detectivity of more than 1 × 10 12 Jones (corrected by noise current) in the NIR region at 10% tensile strain and short response time (2.46 μs), representing state-of-the-art performances. Reducing energetic disorders other …
Charge-generating mid-gap trap states define the …
The model accurately describes the dark current, V OC and the long-debated ideality factor in organic solar cells. Additionally, …
Strong dark current suppression in flexible organic photodetectors …
Such strong dark current suppression of the CNT electrode in OPD was investigated using photoelectron yield spectroscopy (PYS) and computational analysis in …
Study of the open circuit voltage dependence on incident light ...
Therefore, a detailed understanding of physical processes at the heterojunction interface is extremely important for further improving the solar cells performance. The current–density voltage (J-V) characteristics of an OPV under the dark and illumination conditions are usually found to be similar as reported for conventional p …
Beginner''s Guide to Visual Analysis of Perovskite and Organic …
The current density–voltage characteristic (J–V) is a critical tool for understanding the behavior of solar cells.This study presents an overview of the key aspects of J–V analysis and introduces a user-friendly flowchart that facilitates the swift identification of the most probable limiting process in a solar cell, based mainly on the …
High-Efficiency Indoor Organic Photovoltaics with a Band-Aligned ...
In this work, we report high-efficiency non-fullerene organic photovoltaic (OPV) cells with over 30% power conversion efficiency (PCE) in indoor conditions. Our results show that the choice of electron-transporting layer (ETL) is important to enable such performance. ... It is known that the dark current is usually dominated by the leakage ...
Reverse dark current in organic photodetectors and the major …
Therefore, the activation energy of the ideal dark current of organic diodes, based on D–A blends, ... While Eq. successfully explains V OC in organic solar cells, it is not clear whether J 0, linked to V OC by Eq., corresponds to the measured dark current at negative bias voltages (J D).
Mid-gap trap state-mediated dark current in organic photodiodes
Organic photodiodes (OPDs), however, are characterized by a much higher dark current than expected for thermally excited radiative transitions. Here we …
Molecular and morphological influences on the open circuit …
We explore the dependence of the dark current of C(60)-based organic photovoltaic (OPV) cells on molecular composition and the degree of intermolecular interaction of several molecular donor materials. The saturation dark current density, J(S), is an important factor in determining the open circuit …
Significant Dark Current Suppression in Organic …
Dark current density (J dark) is the most important factors determining signal-to-noise ratio, linear dynamic range and detectivity (D *) of organic photodetectors (OPDs). However, the …
Light intensity dependence of organic solar cell operation and ...
We investigated the variation of current density–voltage (J–V) characteristics of an organic solar cell (OSC) in the dark and at 9 different light intensities ranging from 0.01 to 1 sun of the ...
Temperature dependence of dark current properties of In …
Performances of GaAs reference solar cells and 10-layer InGaAs/ GaAs quantum dot solar cells were tested using AM1.5 illumination with results indicate that quantum dot (QD) structures improve the photo-current density compared to reference devices. Systematic measurements of the dark current versus voltage (I–V) …
Molecular and Morphological Influences on the Open Circuit …
We explore the dependence of the dark current of C60-based organic photovoltaic (OPV) cells on molecular composition and the degree of intermolecular interaction of several molecular donor materials. The saturation dark current density, JS, is an important factor in determining the open circuit voltage, Voc. The Voc values of OPVs show a strong …
Diffusion-driven currents in organic-semiconductor diodes
From dark-current measurements on polymer:fullerene organic solar cells, ideality factors of typically 1.3–2.0 have been reported. 29, 36, 37, 38 Furthermore, it was first demonstrated by Mandoc ...
A comprehensive review on dark current in perovskite …
However, dark current (I d) is an important parameter for PDs which is typically high for PPDs and limits the device performance. Therefore, it is critical to …
Analytical Model for Voltage-Dependent Photo and Dark …
A physics-based explicit mathematical model for the external voltage-dependent forward dark current in bulk heterojunction (BHJ) organic solar cells is developed by considering Shockley-Read-Hall (SRH) recombination and solving the continuity equations for both electrons and holes. An analytical model for the external …
Ultralow dark current in near-infrared organic photodetector via ...
A crosslinker additive was used to regulate the conductivity and morphology of the hole-transporting layer (HTL) based on conjugated polyelectrolytes (CPEs) in near-infrared organic photodetectors (OPDs). The dark current density was effectively suppressed, while the photo-to-current conversion, linearity, and speed of devices were …
PHOTO AND DARK CURRENT MECHANISMS IN ORGANIC …
We performed capacitance-voltage measurements on simple bilayer organic solar cells as a function of temperature. These measurements provide information ... The Shockley diode equation has been used extensively to explain the dark current in donor-acceptor organic heterojunctions, but without thorough justification.
Strong dark current suppression in flexible organic photodetectors …
To evaluate the spectral response of the devices with the CNT electrodes under operating conditions in terms of incident light power, the responsivity (R) was explored according to the following equation: (1) R = J ph L in, where J ph is the measured photocurrent density and L in is the illuminated light intensity [32] g. 1 (c) and (d) show …
Fundamentals of organic solar cells: A review on mobility issues …
After the exciton dissociation, the free charges must be transferred to the respective electrode to form the cell current. The transportation is the result of diffusion or electric field drift mechanisms. ... Current density- voltage curve for typical organic solar cells at dark and under illumination conditions [101]. 2.3.2. Efficiency model ...
Recent Progress in Organic Photodetectors and their Applications
Moreover, though organic photodiodes show a lower EQE of lower than 100%, they generally have low dark current, fast response, and wide linear dynamic range. [ 16, 56 - 62 ] Since the first OPDs were fabricated with the organic small molecule dyes merocyanine and rhodamine B by Kudo and Moriizumi in 1981, [ 63 ] which showed a …
Perovskite solar cells: a deep analysis using current–voltage and ...
Perovskite solar cells exhibiting ~ 14–15% efficiency were experimentally measured using current–voltage (I–V) and capacitance–voltage (C–V) techniques in order to extract material and device properties, and understand the action of photovoltaic (PV) operation. Deep analyses were carried out on dark- and illuminated …
Effects of charge injection barrier on the dark current of organic ...
In this work, we investigated the effect of charge injection barrier on the dark current density of organic photodetectors. The photosensitive layer of these …
Experimental investigation of tensile mechanical strain …
In this paper we have experimentally studied the electrical behavior of organic solar cells (OSCs) under mechanical strain in dark condition. Dark current-voltage characteristics of solar cells provide valuable information on …
Reduced bimolecular charge recombination in efficient organic …
The development of non-fullerene acceptors has recently accelerated the improvement in power-conversion efficiency of organic solar cells 1,2,3.As a result, the efficiency of single-junction ...
Molecular and Morphological Influences on the Open …
We explore the dependence of the dark current of C60-based organic photovoltaic (OPV) cells on molecular composition and the degree of intermolecular interaction of several molecular donor materials. The …
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