Distinguishing Energy- and Charge-Transfer Processes in Layered Perovskite Quantum Wells with Two-Dimensional Action Spectroscopies

Zhou, Ninghao; Ouyang, Zhenyu; Hu, Jun; Williams, Olivia F.; Yan, Liang; You, Wei; Moran, Andrew M.

doi:10.1021/acs.jpclett.0c00844

Cited by 22 publications

(48 citation statements)

References 52 publications

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“…concluded that both mechanisms take place: energy transfer between layers dominates on the sub‐ns time scale whereas electron transfer occurs at later times. [ 20 ]…”

Section: Introductionmentioning

confidence: 99%

Double Charge Transfer Dominates in Carrier Localization in Low Bandgap Sites of Heterogeneous Lead Halide Perovskites

Fakharuddin

Franckevičius

Devižis

et al. 2021

Adv Funct Materials

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Heterogeneous organic‐inorganic halide perovskites possess inherent non‐uniformities in bandgap that are sometimes engineered and exploited on purpose, like in quasi‐2D perovskites. In these systems, charge carrier and excitation energy migration to lower‐bandgap sites are key processes governing luminescence. The question, which of them dominates in particular materials and under specific experimental conditions, still remains unanswered, especially when charge carriers comprise excitons. In this study transient absorption (TA) and transient photoluminescence (PL) techniques are combined to address the excited state dynamics in quasi‐2D and other heterogeneous perovskite structures in broad temperature range, from room temperature down to 15 K. The data provide clear evidence that charge carrier transfer rather than energy migration dominates in heterogeneous quasi‐2D perovskite films.

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“…concluded that both mechanisms take place: energy transfer between layers dominates on the sub‐ns time scale whereas electron transfer occurs at later times. [ 20 ]…”

Section: Introductionmentioning

confidence: 99%

Double Charge Transfer Dominates in Carrier Localization in Low Bandgap Sites of Heterogeneous Lead Halide Perovskites

Fakharuddin

Franckevičius

Devižis

et al. 2021

Adv Funct Materials

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“…TWINS can reduce the measurement times and increase the working spectral range considerably. Finally, as reported previously, TWINS can be employed for time-resolved measurements using ultrashort pulses after minor modifications to the interferometer design 15 , highlighting the versatility of this approach [22][23][24] .…”

Section: Discussionmentioning

confidence: 54%

Time-domain photocurrent spectroscopy based on a common-path birefringent interferometer

Wolz

Heshmatpour

Perri

et al. 2020

Review of Scientific Instruments

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We present diffraction-limited photocurrent (PC) microscopy in the visible spectral range based on broadband excitation and an inherently phase-stable common-path interferometer. The excellent path-length stability guarantees a high accuracy without the need for active feedback or post-processing of the interferograms. We illustrate the capabilities of the setup by recording PC spectra of a bulk GaAs device, and compare the results to optical transmission data.

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“…160,272,[274][275][276][277] Action spectroscopies are another avenue of spectroscopic methods, which are often hard to predict and model at the microscopic level. Spectroscopies that use a charge current, 154,161 a photoemission electron, 153 or a fluorescence 7,161,278 readout may provide very powerful functional information. However, modeling the details of the processes behind the action responsible for the readout is often far from straightforward.…”

Section: Concluding Discussion and Future Directionsmentioning

confidence: 99%

“…150 A wide range of other non-linear spectroscopic techniques is available providing insight into different sample properties. 7,14,[151][152][153][154][155][156][157][158][159][160][161] A significant effort has been invested in the efficient calculation of two-dimensional spectroscopic signals. 46,89,162,163…”

Section: G Spectral Simulationsmentioning

confidence: 99%

Computational spectroscopy of complex systems

Jansen

2021

The Journal of Chemical Physics

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Numerous linear and non-linear spectroscopic techniques have been developed to elucidate structural and functional information of complex systems ranging from natural systems, such as proteins and light-harvesting systems, to synthetic systems, such as solar cell materials and light-emitting diodes. The obtained experimental data can be challenging to interpret due to the complexity and potential overlapping spectral signatures. Therefore, computational spectroscopy plays a crucial role in the interpretation and understanding of spectral observables of complex systems. Computational modeling of various spectroscopic techniques has seen significant developments in the past decade, when it comes to the systems that can be addressed, the size and complexity of the sample types, the accuracy of the methods, and the spectroscopic techniques that can be addressed. In this Perspective, I will review the computational spectroscopy methods that have been developed and applied for infrared and visible spectroscopies in the condensed phase. I will discuss some of the questions that this has allowed answering. Finally, I will discuss current and future challenges and how these may be addressed.

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Distinguishing Energy- and Charge-Transfer Processes in Layered Perovskite Quantum Wells with Two-Dimensional Action Spectroscopies

Cited by 22 publications

References 52 publications

Double Charge Transfer Dominates in Carrier Localization in Low Bandgap Sites of Heterogeneous Lead Halide Perovskites

Double Charge Transfer Dominates in Carrier Localization in Low Bandgap Sites of Heterogeneous Lead Halide Perovskites

Time-domain photocurrent spectroscopy based on a common-path birefringent interferometer

Computational spectroscopy of complex systems

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