Full-band quantum transport simulation based on tight-binding Green's function method

Ogawa, Masahiro; Sugano, T.; Tominaga, Ryuichiro; Miyoshi, Tomomitsu

doi:10.1109/sispad.1999.799301

Cited by 2 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where τ encodes the elements of the coupling Hamiltonian between contact and device, and g B is the surface GF of the semi-infinite reservoir. The problem of the coupling to reservoirs then reduces to the calculation of the contact GF g B , which can be achieved via surface GF methods using decimation techniques [48,49], conformal maps [50] or complex band methods [51][52][53][54]. Similar surface GF approaches can also be used for photons [41,55] or phonons [35,56,57] in systems that are open in the optical or vibrational sense, respectively.…”

Section: Interaction Self-energiesmentioning

confidence: 99%

Photovoltaics at the mesoscale: insights from quantum-kinetic simulation

Aeberhard¹

2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

This Topical Review discusses insights into the physical mechanisms of nanostructure solar cell operation as provided by numerical device simulation using a state-of-the-art quantum-kinetic framework based on the non-equilibrium Green's function (NEGF) formalism. After a brief introduction to the field of nanostructure photovoltaics and an overview of the existing literature on theoretical description and experimental implementation of such devices, the quantum-kinetic formulation of photovoltaic processes is discussed in detail, together with more conventional modeling approaches such as global detailed balance theory and the semi-classical drift-diffusion-Poisson-Maxwell picture. Application examples provided subsequently include III-V semiconductor nanostructures ranging from ultra-thin absorbers to quantum well and quantum dot solar cell devices. The focus is on common features encountered in photovoltaic nanostructure architectures such as the impact of configurational parameters and operating conditions on device characteristics, and the pronounced deviations from the semiclassical bulk picture. Ultra-thin absorbers are investigated with focus on the effect of built-in fields and contact configuration on radiative rates and currents. For the case of single and multi-quantum-well p-in devices, generation, recombination, and escape of carriers are discussed, and quantum well superlattice solar cells are considered with regard to charge carrier transport regimes ranging from band-like transport in miniband states to sequential tunneling between neighboring periods. Double quantum well structures are further studied in the context of tunnel junctions for multijunction solar cell. The investigation of quantum dots covers the fluorescence of colloidal nanoparticles for luminescent solar concentrators as well as the impact of configurational parameters on the photovoltaic properties of regimented quantum dot arrays, both in single-junction and intermediate-band configurations.

show abstract

Section: Interaction Self-energiesmentioning

confidence: 99%

Photovoltaics at the mesoscale: insights from quantum-kinetic simulation

Aeberhard¹

2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…In the case of broken translational invariance caused by the use of nanostructures, the size of the eigenvalue problem in (53) will increase by the dimension of the unit cell in the direction of aperiodicity, while the dimension of the reciprocal space is correspondingly reduced. However, the system is not elastically open in the sense that a scattering problem needs to be solved, i.e., the vibrational state can be described in terms of vibrational eigenmodes in all dimensions.…”

Section: Non-interacting Isolated Subsystemsmentioning

confidence: 99%

“…The whole problem of the coupling to the reservoirs is now reduced to the calculation of the contact GF g R , which in principle is of infinite dimension, but only needs to be known in the close vicinity of the device boundary, owing to the reduced dimensionality of the coupling matrix τ , and can therefore be calculated by surface GF methods using decimation techniques [78,79], conformal maps [80] or complex band methods [81,82,83,53].…”

Section: Contactsmentioning

confidence: 99%

“…Apart from the application to actual non-equilibrium quantum transport phenomena comprising ballistic transport and resonant tunneling in semiconductor multilayers and nanostructures of different dimensionality (quantum wells [16], wires [17,18] and dots [19]), metallic and molecular conduction [20,21,22,23,24,25,26], phonon mediated inelastic and thermal transport [27,28,29,30,31], Coulomb-blockade [32,33] and Kondo-effect [34,35], it is also used to describe strongly non-equilibrium and interacting regimes in semiconductor quantum optics requiring a quantum kinetic approach [36,37,38,39,40,41], with phenomena such as non-equilibrium absorption, interband polarization, spontaneous emission and laser gain. The concept was first adapted to the simulation of transport in open nanoscale devices on the example of tunneling in metal-insulator-metal junctions [42], and has in the following been applied to investigation and modelling of MOSFET [43,44,45,46,47], CNT-FET [48,49], resonant tunneling diodes [50,51,27,52,16,53] and interband tunneling diodes [54,…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Theory and simulation of quantum photovoltaic devices based on the non-equilibrium Green’s function formalism

Aeberhard

2011

J Comput Electron

View full text Add to dashboard Cite

This article reviews the application of the non-equilibrium Green's function formalism to the simulation of novel photovoltaic devices utilizing quantum confinement effects in low dimensional absorber structures. It covers well-known aspects of the fundamental NEGF theory for a system of interacting electrons, photons and phonons with relevance for the simulation of optoelectronic devices and introduces at the same time new approaches to the theoretical description of the elementary processes of photovoltaic device operation, such as photogeneration via coherent excitonic absorption, phonon-mediated indirect optical transitions or non-radiative recombination via defect states. While the description of the theoretical framework is kept as general as possible, two specific prototypical quantum photovoltaic devices, a single quantum well photodiode and a silicon-oxide based superlattice absorber, are used to illustrated the kind of unique insight that numerical simulations based on the theory are able to provide.

show abstract

Full-band quantum transport simulation based on tight-binding Green's function method

Cited by 2 publications

References 12 publications

Photovoltaics at the mesoscale: insights from quantum-kinetic simulation

Photovoltaics at the mesoscale: insights from quantum-kinetic simulation

Theory and simulation of quantum photovoltaic devices based on the non-equilibrium Green’s function formalism

Contact Info

Product

Resources

About