Scanning optical probe microscopy with submicrometer resolution using an organic photodetector

An, Kwang H.; O’Connor, Brendan; Pipe, Kevin P.; Zhao, Yiying; Shtein, Max

doi:10.1063/1.2963033

Cited by 12 publications

(6 citation statements)

References 17 publications

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“…[1][2][3][4][5] In recent years, organic photodetectors have made great progress and shown signicant potential in a variety of applications. [6][7][8][9][10] The highest operation frequency reached 430 MHz in an organic photodetector incorporating an ultrathin donor-acceptor alternating multilayer stack as the optically active region. 11 However, ultrahighvacuum conditions are needed during organic molecular-beam deposition.…”

Section: Introductionmentioning

confidence: 99%

1,1-Bis[(di-4-tolylamino)phenyl]cyclohexane for fast response organic photodetectors with high external efficiency and low leakage current

Yang

2013

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

1,1-Bis[(di-4-tolylamino)phenyl]cyclohexane for fast response organic photodetectors with high external efficiency and low leakage current

Yang

2013

J. Mater. Chem. C

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“…Moreover, significant progress was recently observed in the manufacture of new tips using processing methods [16,17], and the simulation of new tip designs for future manufacture [18]. Case studies combining organic light-emitting devices (OLEDs) with micromachined silicon cantilevers [19], as well as organic photodetectors [20], were also investigated. The idea of combining the two measurement capabilities, AFM and NSOM, into one dual mode based on silicon tips is quite unique and presents several advantages.…”

Section: Afm-nsom Dual-mode Conceptmentioning

confidence: 99%

Advanced Surface Probing Using a Dual-Mode NSOM–AFM Silicon-Based Photosensor

et al. 2019

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A feasibility analysis is performed for the development and integration of a near-field scanning optical microscope (NSOM) tip–photodetector operating in the visible wavelength domain of an atomic force microscope (AFM) cantilever, involving simulation, processing, and measurement. The new tip–photodetector consists of a platinum–silicon truncated conical photodetector sharing a subwavelength aperture, and processing uses advanced nanotechnology tools on a commercial silicon cantilever. Such a combined device enables a dual-mode usage of both AFM and NSOM measurements when collecting the reflected light directly from the scanned surface, while having a more efficient light collection process. In addition to its quite simple fabrication process, it is demonstrated that the AFM tip on which the photodetector is processed remains operational (i.e., the AFM imaging capability is not altered by the process). The AFM–NSOM capability of the processed tip is presented, and preliminary results show that AFM capability is not significantly affected and there is an improvement in surface characterization in the scanning proof of concept.

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“…We plan to verify the long-term reliability of thin metal electrodes and their compatibility with a wider range of substrates. We also plan to apply such electrodes more effectively in the various nonplanar energy-conversion devices (such as solar cells and OLEDs on fibers or on atomic-force-microscope probe tips) we demonstrated previously, [17][18][19][20] in addition to the conventional planar devices.…”

Section: Continued On Next Pagementioning

confidence: 99%

Thin metal films as simple transparent conductors

Shtein¹

2009

SPIE Newsroom

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Because of optical microcavity effects, using thin nonpatterned metal films instead of indium tin oxide in organic solar cells can result in similar efficiencies.Large-area transparent conductors are essential in many important applications, such as thin-film solar cells, traditional LCDs, and organic LEDs (OLEDs). The widely used transparent conducting oxides (TCOs), such as indium tin oxide (ITO), are typically deposited using plasma sputtering or sol-gel methods. There is a natural tradeoff between transparency and conductivity, with the best films exceeding 90% transparency in the visible part of the spectrum at sheet resistances below 15˝/square. This level of performance is suitable for thin-film solar-cell applications, where a sparse metal grid can be added to the TCO film as an auxiliary conductor to minimize ohmic losses during charge collection.However, TCOs typically exhibit a combination of shortcomings (e.g., brittleness, expensive source materials, processing problems, or availability of suitable flexible substrates). 1 They are particularly problematic in reel-to-reel processing of thin-film, flexible devices because they are susceptible to cracking, which raises the film's electrical resistance and makes it permeable to oxygen and moisture that accelerate device degradation. An acute need exists for transparent conductors that are fundamentally different from TCOs in their mechanical, processing, and cost characteristics. 2 The search for TCO replacements for organic photovoltaic (OPV) devices has focused on carbon nanotubes, 3 graphene, 4 highly conductive polymers, 5 and metallic microgrids combined with conducting polymers. 6 But few of these approaches have yielded devices that perform as well as those using ITO, and fewer can be scaled up cost-effectively.Instead, we considered using a very thin, unpatterned metal film. Metals are malleable and can be deposited relatively cheaply and rapidly onto continuously spooled substrate. In organic optoelectronics, thin metal films have been investigated as stand-alone transparent electrodes 7-11 and in conjunction

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Scanning optical probe microscopy with submicrometer resolution using an organic photodetector

Abstract: Articles you may be interested inReal time reduction of probe-loss using switching gain controller for high speed atomic force microscopy Rev. Sci. Instrum.

Cited by 12 publications

References 17 publications

1,1-Bis[(di-4-tolylamino)phenyl]cyclohexane for fast response organic photodetectors with high external efficiency and low leakage current

1,1-Bis[(di-4-tolylamino)phenyl]cyclohexane for fast response organic photodetectors with high external efficiency and low leakage current

Advanced Surface Probing Using a Dual-Mode NSOM–AFM Silicon-Based Photosensor

Thin metal films as simple transparent conductors

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