Color Determination from a Single Broadband Organic Photodiode

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.201901722.Obtaining spectral information about incident light, whether a spectrum, a color image, or simply the average wavelength, is highly desirable for many applications such as machine vision and chemical analysis. [1][2][3][4] Such "color information" requires wavelength discrimination and is provided in a conventional spectrometer by a dispersive component such as a prism or diffraction grating. While such components enable high spectral

Filter‐Free Band‐Selective Organic Photodetectors

“…To address the above technical issues, much effort has been devoted to developing highly sensitive filter-free band-selective PDs. [10] Several filter-free band-selective photodetection approaches have been reported, e.g., using narrowband light-absorbing photoactive semiconductors, [11][12][13] microcavity structure, [14][15][16][17] electrode modification, [18,19] and charge collection narrowing (CCN) effect in the PDs. [20,21] The photo response in the conventional photodiode-type PDs is dependent on the absorption characteristics of the photoactive layer.…”

The Bulk Heterojunction in Organic Photovoltaic, Photodetector, and Photocatalytic Applications

“…[219,220] In particular, a low J d , defined as any current generated under an applied reverse voltage in the absence of light, allows the conversion of low levels of light into a detectable electrical signal, without the need of applying a significant external negative voltage. [221,222] High J d values are often attributed to charge injection from the contacts into the semiconductor, or thermally generated charges in the bulk. [223] These limitations can be overcome by adopting a planar heterojunction (bilayer) made via sequential vacuum deposition of individual D and A materials.…”

Recent Progress on Broadband Organic Photodetectors and their Applications

“…[4] In the past two decades, solution-processed organic photodetectors (OPDs) have drawn much more attentions owing to their inherent advantages over the inorganic counterparts, such as solution and largearea processability, mechanical flexibility, light weight, room operating temperature, and low costs, which compensate well for the drawbacks of commercial inorganic photodetectors. [15][16][17][18][19][20] The response spectral range of OPDs is primarily determined by the photon harvesting range of the organic semiconductors in active layers. [21][22][23][24][25] The OPDs can be classified as broadband OPDs and narrowband OPDs in light of the bandwidth of photoresponse.…”

“…[ 4 ] In the past two decades, solution‐processed organic photodetectors (OPDs) have drawn much more attentions owing to their inherent advantages over the inorganic counterparts, such as solution and large‐area processability, mechanical flexibility, light weight, room operating temperature, and low costs, which compensate well for the drawbacks of commercial inorganic photodetectors. [ 15–20 ]…”