Optical limiting as result a of photoinduced electron transfer in hybrid systems with CdSe/ZnS quantum dots, C_60, and Perylene

Danilov, V. V.; Panfutova, A. S.; Khrebtov, A. I.; Ambrosini, Stefano; Videnichev, D. A.

doi:10.1364/ol.37.003948

Cited by 30 publications

(12 citation statements)

References 6 publications

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“…Fullerene molecules such as C 60 and C 70 have been the subject of intensive research during the past decades due to their intriguing structural, electronic and optical properties [1][2][3][4][5][6][7][8][9][10]. The search for possible fullerene-like molecules has attracted more and more attention.…”

Section: Introductionmentioning

confidence: 99%

Design molecular rectifier and photodetector with all-boron fullerene

Yang

Lan

et al. 2015

Solid State Communications

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Section: Introductionmentioning

confidence: 99%

Design molecular rectifier and photodetector with all-boron fullerene

Yang

Lan

et al. 2015

Solid State Communications

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“…Since the seminal works reporting a quantum size effect in semiconductor nanocrystals in 1981 and luminescence from semiconductor colloidal solutions in 1982 colloidal semiconductor quantum dots have become the subject of intensive experimental and theoretical research due to their wide range of size‐tunable properties, notably optical properties which make them potential candidates for applications in areas such as biolabeling, bioimaging, bio‐ and chemo‐sensing, theranostics, lasing, photovoltaic energy conversion, photodetection, and light‐emitting diodes among others .…”

mentioning

confidence: 99%

Room‐temperature luminescence decay of colloidal semiconductor quantum dots: Nonexponentiality revisited

et al. 2016

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While time-resolved luminescence spectroscopy is commonly used as a quantitative tool for the analysis of the dynamics of photoexcitation in colloidal semiconductor quantum dots, the interpretation of the virtually ubiquitous nonexponential decay profiles is frequently ambiguous, because the assumption of multiple discrete exponential components with distinct lifetimes for resolving the decays is often arbitrary. Here, an interpretation of the roomtemperature luminescence decay of CdSe/ZnS semiconductor quantum dots in colloidal solutions is presented based on the Kohlrausch relaxation function. It is proposed that the decay can be understood by using the concept of Förster resonance energy transfer (FRET) assuming that the role of acceptors of photoexcitation energy is played by highfrequency anharmonic molecular vibrations in the environment of the quantum dots. The term EVFRET (ElectronicVibrational Förster Resonance Energy Transfer) is introduced in order to unequivocally refer to this energy transfer process.Since the seminal works reporting a quantum size effect in semiconductor nanocrystals in 1981 [1] and luminescence from semiconductor colloidal solutions in 1982 [2,3] colloidal semiconductor quantum dots have become the subject of intensive experimental and theoretical research due to their wide range of size-tunable properties, notably optical properties [4-6] which make them potential candidates for applications in areas such as biolabeling, bioimaging, bio-and chemo-sensing, theranostics, lasing, photovoltaic energy conversion, photodetection, and light-emitting diodes among others [7][8][9][10][11][12][13][14][15].The understanding of the principles governing luminescence in colloidal quantum dot systems is necessary in order to envisage ways of controlling their properties. At the same time, the room-temperature luminescence decays of quantum dots are typically nonexponential, [7,[16][17][18] which may lead to ambiguity in their interpretation as the assumption of multiple discrete exponential components with distinct lifetimes for resolving the decays is often arbitrary. Indeed, pre-exponential factors and decay times in nonexponential luminescence decays have clear physical meaning only in the simplest cases [19]. On the other hand, while the intrinsic exciton dynamics of CdSe colloidal semiconductor quantum dots, by far the most extensively investigated quantum dot system, is generally understood [20,21], the same cannot be said about the effects of extrinsic factors, such as capping layer or colloidal solution environment, which are expected to play a prominent role in the photophysical processes in those systems [22].The Kohlrausch or stretched exponential relaxation function, exp [−(t/τ ) β ], where 0 < β ࣘ 1 and τ has the dimensions of time, has been in use for over 150 years to describe relaxation processes in electronic and molecular systems [23], including luminescence decay in condensed matter, most remarkably by Alfred Werner in 1907 and Theodor Förster in 1949 [24]. The stretching p...

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“…Имеются сообщения о возможности использования гибридных наноструктур и их свойств для различных приложений науки и техники, в том числе в биомедицине для фото-динамической терапии, люминесцентного маркирования биообъектов и нелинейной оптики [5][6][7][8][9][10][11].…”

Section: Introductionunclassified

“…Однако система-тических данных относительно подобного рода прояв-лений в литературе пока нет. Имеется лишь несколько сообщений о расширении возможностей для управления эффективностью ограничения мощности за счет созда-ния гибридных (или сопряженных) наноструктур [11,14].…”

Section: Introductionunclassified