Journal ArticleDOI
Balanced Carrier Mobilities: Not a Necessary Condition for High‐Efficiency Thin Organic Solar Cells as Determined by MIS‐CELIV
Ardalan Armin,Gytis Juška,Mujeeb Ullah,Marappan Velusamy,Paul L. Burn,Paul Meredith,Almantas Pivrikas +6 more
TLDR
In this paper, a novel technique based upon injection-charge extraction by linearly increasing voltage (i-CELIV) in a metal-insulator-semiconductor (MIS) diode structure is described for studying charge transport in organic semiconductors.Abstract:
A novel technique based upon injection-charge extraction by linearly increasing voltage (i-CELIV) in a metal-insulator-semiconductor (MIS) diode structure is described for studying charge transport in organic semiconductors. The technique (MIS-CELIV) allows selective measurement of both electron and hole mobilities of organic solar cells with active layers thicknesses representative of operational devices. The method is used to study the model high efficiency bulk heterojunction combination poly[N-9-heptadecanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole)] (PCDTBT) and [6,6]-phenyl C70-butyric acid methyl ester (PC70BM) at various blend ratios. The absence of bipolar transport in PCDTBT-and-PC70BM-only diodes is shown and strongly imbalanced carrier mobility is found in the most efficient optimized blend ratios. The mobility measurements are correlated with overall device performance and it is found that balanced and high charge carrier mobility are not necessarily required for high efficiencies in thin film organic solar cells.read more
Citations
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Journal ArticleDOI
Organic Photodiodes: The Future of Full Color Detection and Image Sensing
TL;DR: Organic photodiodes (OPDs) are beginning to rival their inorganic counterparts in a number of performance criteria including the linear dynamic range, detectivity, and color selectivity.
Journal ArticleDOI
Filterless narrowband visible photodetectors
TL;DR: In this article, a method for tuning the spectral response to give filterless, narrowband red, green and blue photodiodes was proposed, which is suitable for many imaging applications.
Journal ArticleDOI
Narrowband light detection via internal quantum efficiency manipulation of organic photodiodes
TL;DR: This work demonstrates the first sub-100 nm full-width-at-half-maximum visible-blind red and NIR photodetectors with state-of-the-art performance across critical response metrics, based on organic photodiodes with optically thick junctions.
Journal ArticleDOI
Low Noise, IR‐Blind Organohalide Perovskite Photodiodes for Visible Light Detection and Imaging
TL;DR: Solution-processed organohalide perovskite perov-skite photodiodes that have performance metrics matching silicon, but are infrared-blind are reported.
Journal ArticleDOI
Thick junction broadband organic photodiodes
TL;DR: In this article, a broadband organic photodiode with an active layer comprised of a poly[N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole) bulk heterojunction blend was reported.
References
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Journal ArticleDOI
Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
TL;DR: In this article, an upper theoretical limit for the efficiency of p−n junction solar energy converters, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of holeelectron pairs is radiative as required by the principle of detailed balance.
Journal ArticleDOI
Bulk heterojunction solar cells with internal quantum efficiency approaching 100
Sung Heum Park,Sung Heum Park,Anshuman Roy,Serge Beaupré,Shinuk Cho,Shinuk Cho,Nelson E. Coates,Ji Sun Moon,Ji Sun Moon,Daniel Moses,Mario Leclerc,Kwanghee Lee,Kwanghee Lee,Alan J. Heeger,Alan J. Heeger +14 more
TL;DR: In this paper, a polymer solar cell based on a bulk hetereojunction design with an internal quantum efficiency of over 90% across the visible spectrum (425 nm to 575 nm) is reported.
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Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure
TL;DR: In this article, the authors showed that PFN can be incorporated into polymer light-emitting devices (PLEDs) to enhance electron injection from high-work-function metals such as aluminium (work function w of 4.3 eV) and gold (w ¼ 5.2 eV).
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For the Bright Future—Bulk Heterojunction Polymer Solar Cells with Power Conversion Efficiency of 7.4%
TL;DR: The past success in organic light-emitting diodes provides scientists with confidence that organic photovoltaic devices will be a vital alternate to the inorganic counterpart, and the easiness of the fabrication holds the promise of very low-cost manufacturing process.
Journal ArticleDOI
Toward a rational design of poly(2,7-carbazole) derivatives for solar cells.
Nicolas Blouin,Alexandre Michaud,David Gendron,Salem Wakim,Emily Blair,Rodica Neagu-Plesu,Michel Belletête,Gilles Durocher,Ye Tao,Mario Leclerc +9 more
TL;DR: This study reveals that the alternating copolymer HOMO energy level is mainly fixed by the carbazole moiety, whereas the LUMO energylevel is mainly related to the nature of the electron-withdrawing comonomer.