Фотолюминесценция с временным разрешением наноструктур InGaAs различной квантовой размерности

By using time-correlated single-photon counting time-resolved photoluminescence of quantum-sized heterostructures of different dimensionality was investigated. InGaAs quantum dots, quantum well, and transitionally-dimensional structure — quantum well-dots were grown on GaAs substrates. It was observed, that photoluminescence decay strongly depends on structure dimensionality resulting in decay value of 6,7, and more than 20 ns for quantum dots, well-dots and well, respectively. As we believe localization centers in heterostructures may be responsible for such shortening of photoluminescence lifetime.

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Structure and photophysics of rubrene-tetracene blends

Electronic Structure ◽

10.1088/2516-1075/ac47f2 ◽

2022 ◽

Author(s):

Clemens Zeiser ◽

Adam Jacob Berges ◽

Tim Rammler ◽

Frederik Munko ◽

Alfred Johann Meixner ◽

...

Keyword(s):

Optical Band Gap ◽

Single Photon ◽

Photon Counting ◽

Singlet Fission ◽

Excited Singlet ◽

Time Resolved ◽

Single Photon Counting ◽

Application Potential ◽

Time Resolved Photoluminescence ◽

Spontaneous Conversion

Abstract The application potential of singlet fission (SF), describing the spontaneous conversion of an excited singlet into two triplets, underlines the necessity to independently control SF rates, energetics and the optical band gap. Heterofission, whereby the singlet splits into triplets on chemically distinct chromophores, is a promising approach to control the above-mentioned parameters, but its details are not yet fully understood. Here, we investigate the photophysics of blends of two prototypical SF chromophores, tetracene (TET) and rubrene (RUB) using time-resolved photoluminescence spectroscopy and time-correlated single photon counting (TCSPC) to explore the potential for heterofission in combinations of endothermic SF chromophores.

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Single Point PICA Probing with an Avalanche Photo-Diode

ISTFA 2001: Conference Proceedings from the 27th International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2001p0023 ◽

2001 ◽

Author(s):

Mike Bruce ◽

Rama R. Goruganthu ◽

Shawn McBride ◽

David Bethke ◽

J.M. Chin

Keyword(s):

Single Photon ◽

Single Point ◽

Photon Counting ◽

Ring Oscillator ◽

Time Resolved ◽

Single Photon Counting ◽

Photo Diode ◽

Avalanche Photo Diode ◽

Photo Multiplier Tube ◽

Channel Plate

Abstract For time resolved hot carrier emission from the backside, an alternate approach is demonstrated termed single point PICA. The single point approach records time resolved emission from an individual transistor using time-correlated-single-photon counting and an avalanche photo-diode. The avalanche photo-diode has a much higher quantum efficiency than micro-channel plate photo-multiplier tube based imaging cameras typically used in earlier approaches. The basic system is described and demonstrated from the backside on a ring oscillator circuit.

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