Miniaturized TEG with thermal generation of free carriers

Span, G.; Wagner, Martin; Grasser, T.; Holmgren, Lennart

doi:10.1002/pssr.200701171

Cited by 34 publications

(21 citation statements)

References 5 publications

(2 reference statements)

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“…Furthermore, applying higher temperatures T h directly leads to an enhancement of the efficiency. Originally, the architecture has been proposed by G. Span and subsequent simulations have focused on thin film devices .…”

Section: Devicesmentioning

confidence: 99%

Silicon‐based nanocomposites for thermoelectric application

Schierning

Stoetzel

Chavez

et al. 2016

Physica Status Solidi (a)

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Here we present the realization of efficient and sustainable silicon‐based thermoelectric materials from nanoparticles. We employ a gas phase synthesis for the nanoparticles which is capable of producing doped silicon (Si) nanoparticles, doped alloy nanoparticles of silicon and germanium (Ge), SixGe1–x, and doped composites of Si nanoparticles with embedded metal silicide precipitation phases. Hence, the so‐called “nanoparticle in alloy” approach, theoretically proposed in the literature, forms a guideline for the material development. For bulk samples, a current‐activated pressure‐assisted densification process of the nanoparticles was optimized in order to obtain the desired microstructure. For thin films, a laser annealing process was developed. Thermoelectric transport properties were characterized on nanocrystalline bulk samples and laser‐sintered‐thin films. Devices were produced from nanocrystalline bulk silicon in the form of p–n junction thermoelectric generators, and their electrical output data were measured up to hot side temperatures of 750 °C. In order to get a deeper insight into thermoelectric properties and structure forming processes, a 3D‐Onsager network model was developed. This model was extended further to study the p–n junction thermoelectric generator and understand the fundamental working principle of this novel device architecture. Gas phase synthesis of composite nanoparticles; nanocrystalline bulk with optimized composite microstructure; laser‐annealed thin film.

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Section: Devicesmentioning

confidence: 99%

Silicon‐based nanocomposites for thermoelectric application

Schierning

Stoetzel

Chavez

et al. 2016

Physica Status Solidi (a)

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“…Consequently, quantum well is preferable to thermoelectric applications in the range of a > 8 nm. SiGe quantum well of thickness from 20 nm to 100 nm as often seen in SiGe base can be uniformly grown by UHV-CVD epitaxy technique [14].…”

Section: Quantum Well-like Layer In Cmos Processmentioning

confidence: 99%

Application of quantum well-like thermocouple to thermoelectric energy harvester by BiCMOS process

Yang

Cong

Lee

2011

Sensors and Actuators A: Physical

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“…al. 6 , wherein the hot-side p-metal-n junction in a TE is replaced by a p-n junction and electron generation events supply the TE current. They proposed that the TV can slightly exceed the limiting TE efficiency.…”

Section: Introductionmentioning

confidence: 99%

Phonovoltaic. I. Harvesting hot optical phonons in a nanoscalep−njunction

Melnick

Kaviany

2016

Phys. Rev. B

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The phonovoltaic (pV) cell is similar to the photovoltaic. It harvests nonequilibrium (hot) optical phonons (E p,O ) more energetic than the bandgap (∆E e,g ) to generate power in a p-n junction.We examine the theoretical electron-phonon and phonon-phonon scattering rates, the Boltzmann transport of electrons, and the diode equation and hydrodynamic simulations to describe the operation of a pV cell and develop an analytic model predicting its efficiency. Our findings indicate that a pV material with E p,O ≃ ∆E e,g ≫ k B T , where k B T is the thermal energy, and a strong interband electron-phonon coupling surpasses the thermoelectric limit, provided the optical phonon population is excited in a nanoscale cell -enabling the ensuing local nonequilibrium. Finding and tuning a material with these properties is challenging. In Part II (this issue), we tune the bandgap of graphite within density functional theory through hydrogenation and the application of uniaxial strains. The bandgap is tuned to resonate with its energetic optical phonon modes and calculate the ab initio electron-phonon and phonon-phonon scattering rates. While hydrogenation degrades the strong electron-phonon coupling in graphene such that the figure of merit vanishes, we outline the methodology for a continued material search.

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Miniaturized TEG with thermal generation of free carriers

Cited by 34 publications

References 5 publications

Silicon‐based nanocomposites for thermoelectric application

Silicon‐based nanocomposites for thermoelectric application

Application of quantum well-like thermocouple to thermoelectric energy harvester by BiCMOS process

Phonovoltaic. I. Harvesting hot optical phonons in a nanoscalep−njunction

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