Zobrazeno 1 - 10
of 228
pro vyhledávání: '"Acuna, Carlos"'
We propose a quantum analogue of the Huygens clock, in which the phases of two spins achieve synchronization through their interaction with a shared environment. The environment functions analogously to the escapement mechanism in a mechanical clock,
Externí odkaz:
http://arxiv.org/abs/2407.17388
Autor:
Quirós-Cordero, Victoria, Rojas-Gatjens, Esteban, Gómez-Dominguez, Martín, Li, Hao, Perini, Carlo A. R., Stingelin, Natalie, Correa-Baena, Juan-Pablo, Bittner, Eric R., Kandada, Ajay Ram Srimath, Silva-Acuña, Carlos
Polariton condensation relies on the macroscopic occupation of the lowest-energy polariton state beyond a critical density. The mechanisms driving the occupation and depopulation of this state all rely on multi-particle scattering, whose dynamics det
Externí odkaz:
http://arxiv.org/abs/2404.14744
Autor:
Rojas-Gatjens, Esteban, Akkerman, Quinten A., Manna, Liberato, Kandada, Ajay Ram Srimath, Silva-Acuña, Carlos
Publikováno v:
J. Chem. Phys. 160, 221101 (2024)
The use of semiconductor nanocrystals in scalable quantum technologies requires characterization of the exciton coherence dynamics in an \emph{ensemble} of electronically isolated crystals in which system-bath interactions are nevertheless strong. In
Externí odkaz:
http://arxiv.org/abs/2402.11673
Autor:
Zheng, Yulong, Rojas-Gatjens, Esteban, Lee, Myeongyeon, Reichmanis, Elsa, Silva-Acuña, Carlos
Publikováno v:
J. Phys. Chem. Lett. 2024, 15, 3705-3712
Bound and unbound Frenkel-exciton pairs are essential transient precursors for a variety of photophysical and biochemical processes. In this work, we identify bound and unbound {Frenkel}-exciton complexes in an electron push-pull polymer semiconducto
Externí odkaz:
http://arxiv.org/abs/2401.04035
Autor:
Zheng, Yulong, Venkatesh, Rahul, Rojas-Gatjens, Esteban, Reichmanis, Elsa, Silva-Acuña, Carlos
Publikováno v:
J. Phys. Chem. Lett. 2024, 15, 272-280
Exciton-exciton annihilation is a ubiquitous nonlinear dynamical phenomenon in materials hosting Frenkel excitons, that has been employed to probe exciton diffusion processes in conjugated polymeric materials. In this work, we investigate the nonline
Externí odkaz:
http://arxiv.org/abs/2311.02716
Autor:
Gatjens, Esteban Rojas, Li, Hao, Flick, Alejandro Vega, Cortecchia, Daniele, Petrozza, Annamaria, Bittner, Eric R., Kandada, Ajay Ram Srimath, Acuña, Carlos Silva
Publikováno v:
J. Phys. Chem. C 2023, 127, 43, 21194-21203
We present a study on the many-body exciton interactions in a prototype Ruddlesden-Popper metal halide (RPMH), namely \ce{(PEA)2SnI4} (PEA = phenylethylammine), using coherent two-dimensional electronic spectroscopy. The optical dephasing times of th
Externí odkaz:
http://arxiv.org/abs/2304.02461
Autor:
Rojas-Gatjens, Esteban, Yallum, Kaila, Shi, Yangwei, Zheng, Yulong, Bills, Tyler, Perini, Carlo Andrea Riccardo, Correa-Baena, Juan-Pablo, Ginger, David S., Banerji, Natalie, Silva-Acuña, Carlos
Publikováno v:
The Journal of Physical Chemistry C (2023)
We explore the application of excitation correlation spectroscopy to detect nonlinear photophysical dynamics in two distinct semiconductor classes through time-integrated photoluminescence and photocurrent measurements. In this experiment, two variab
Externí odkaz:
http://arxiv.org/abs/2304.00390
Autor:
Zheng, Yulong, Venkatesh, Rahul, Callaway, Connor P., Viersen, Campbell, Fagbohungbe, Kehinde H., Liu, Aaron L., Risko, Chad, Reichmanis, Elsa, Silva-Acuña, Carlos
Publikováno v:
Chem. Mater. 2023, 35, 23, 10258-10267
Linear and nonlinear optical lineshapes reveal details of excitonic structure in semiconductor polymers. We implement absorption, photoluminescence, and transient absorption spectroscopies in DPP-DTT, an electron push-pull copolymer, to explore the r
Externí odkaz:
http://arxiv.org/abs/2303.10927
The photophysics of $\pi$-conjugated polymers has been of considerable interest over the last three decades because of their organic semiconductor properties. Primary photoexcitations, Frenkel excitons, can be probed optically by means of numerous li
Externí odkaz:
http://arxiv.org/abs/2210.16618
Autor:
Shi, Yangwei, Rojas-Gatjens, Esteban, Wang, Jian, Pothoof, Justin, Giridharagopal, Rajiv, Ho, Kevin, Jiang, Fangyuan, Taddei, Margherita, Yang, Zhaoqing, Silva-Acuña, Carlos, Ginger, David S.
We demonstrate reduced surface recombination velocity (SRV) and enhanced power-conversion efficiency (PCE) in mixed-cation mixed-halide perovskite solar cells by using (3-aminopropyl)trimethoxysilane (APTMS) as a surface passivator. We show the APTMS
Externí odkaz:
http://arxiv.org/abs/2209.15105