Tuning of the Thermoelectric Figure of Merit of CH3NH3MI3 (M═Pb,Sn) Photovoltaic Perovskites

Mettan, Xavier; Pisoni, Riccardo; Matus, Péter; Pisoni, Andrea; Jaćimović, Jaćim; Náfrádi, Bálint; Spina, Massimo; Pavuna, Davor; Forró, Lászlø; Horváth, Endre

doi:10.1021/acs.jpcc.5b03939

Cited by 160 publications

(200 citation statements)

References 18 publications

(42 reference statements)

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“…[3][4][5][6][7][8][9][10] Based on the unique properties of these hybrid lead-based perovskites, such as high charge carrier mobility and high diffusion length, they have attracted intense attention for possible thermoelectric (TE) applications. [11][12][13] Low thermal conductivity, and high carrier mobility and Seebeck coefficient are desirable for promising thermoelectric materials. 14 Compared with inorganic-based thermoelectric materials, polymer and organic-inorganic perovskite materials have attracted more attention for potential thermoelectric application due to their lower thermal conductivity and density.…”

Section: Introductionmentioning

confidence: 99%

Ultra-high Seebeck coefficient and low thermal conductivity of a centimeter-sized perovskite single crystal acquired by a modified fast growth method

Wang

et al. 2017

J. Mater. Chem. C

109

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A centimeter-sized organic-inorganic hybrid lead-based perovskite CH 3 NH 3 PbI 3 (MAPbI 3 ) single crystal was obtained by using a modified fast and inverse-temperature growth method. The optical properties of this single crystal at room and low temperatures were studied in terms of optical absorption and photoluminescence measurements. The single crystal exhibited optical properties with a band-gap of 1.53 eV, which is comparable to a reported value. The temperature-dependent UV-vis spectra of this perovskite single crystal showed a unique structural phase transition as the temperatures varied. The These thermoelectric characteristics would be useful for potential thermoelectric applications if the electrical conductivity of this crystal is improved by tuning its composition.

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Section: Introductionmentioning

confidence: 99%

Ultra-high Seebeck coefficient and low thermal conductivity of a centimeter-sized perovskite single crystal acquired by a modified fast growth method

Wang

et al. 2017

J. Mater. Chem. C

109

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“…124 other studies experimentally determine high Seebeck coefficients of 820 μV.K −1 (measured in the dark) to 540 μV.K −1 (measured under illumination). 125 However due to the low electrical conductivity 0.05 S cm −1 owning to a low carrier concentration doping is necessary in order to increase conductance. 126 Interestingly the perovskite material exhibits different Seebeck coefficients depending on light environment due to charge availability upon photon excitation.…”

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confidence: 99%

“…126 Interestingly the perovskite material exhibits different Seebeck coefficients depending on light environment due to charge availability upon photon excitation. 125 The same study conducted several experiments with doped CH 3 NH 3 SnI 3 showing the potential for high ZT of 3 with the optimum electrical conductivity.…”

mentioning

confidence: 99%

Review—Organic Materials for Thermoelectric Energy Generation

Cowen

Atoyo

Carnie

et al. 2017

ECS J. Solid State Sci. Technol.

125

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Organic semiconductor materials have been promising alternatives to their inorganic counterparts in several electronic applications such as solar cells, light emitting diodes, field effect transistors as well as thermoelectric generators. Their low cost, light weight and flexibility make them appealing in future applications such as foldable electronics and wearable circuits using printing techniques. In this report, we present a mini-review on the organic materials that have been used for thermoelectric energy generation. The reduction in the effects of climate change, caused by the burning of fossil fuels, has recently been given increased emphasis by major world governments and it is therefore necessary to consider the efficiency of the methods we currently use to generate energy. It has previously been estimated that 63% of global energy consumption is wasted with the major form of this waste being heat.1,2 It is therefore important to develop methods of reconverting this wasted heat back in to useful forms of energy, such as electricity.Thermoelectric generators (TEG) are a promising technology which make use of a process known as the Seebeck effect for heat recovery. The Seebeck effect can be described as two dissimilar conductors or semiconductors connected thermally in parallel and electrically in series and exposed to a temperature gradient causing a difference in voltage between the two materials.3,4 In a TEG one p-type and one ntype semiconductor make use of the Seebeck effect by connecting one to the other electrically in series and thermally in parallel; a general device setup is shown in Figure 1. By connecting the two components, by a junction which is heated, the n-type component of the device transports electrons from the hot junction to a heat sink while the p-type material transports positively charged holes along the same direction of the temperature gradient. The reverse is also possible if the holes and electrons flow away from a cold connecting junction to a heated point at the end of each semiconductor, this induces a constant cooling at the junction through the Peltier effect. 4,5The quantification of the Seebeck effect, in a specific material, is given by the Seebeck coefficient, α, and is the open circuit voltage of a material subjected to a temperature gradient, commonly with units on the scale of μVK −1 to mVK −1 . 6 A materials overall efficiency in the conversion of heat to electricity is given by the dimensionless figure of merit, ZT, defined as,where σ is the electrical conductivity and κ is the thermal conductivity. [6][7][8] It is therefore necessary for thermoelectric materials to have a high electrical conductivity and a low thermal conductivity making electrically conducting metals inappropriate for thermoelectric applications due to their high thermal conductivities and low z E-mail: m.j.carnie@swansea.ac.uk; derya.baran@kaust.edu.sa; b.c.schroeder@qmul .ac.uk Seebeck coefficients. The ideal thermoelectric materials should be an electrical crystal to maximize σ and at the s...

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“…Recent studies reported that thermoelectric figure of merit ZT can reach close to unity by increasing charge carrier concentration through photo-induced or chemical doping. 17,18 In this letter, we studied the lattice thermal conductivity of the hybrid perovskite MAPbI3 from 160 K to 400 K. As temperature increases, MAPbI3 exhibits a phase transition from the tetragonal (160 -330 K) to the pseudocubic phase (>330 K). 15 For each phase, an empirical potential field is developed based on density functional theory (DFT) calculations 19 , and molecular dynamics (MD) simulations are then performed to extract the lattice thermal conductivity.…”

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confidence: 99%

Lattice thermal conductivity of organic-inorganic hybrid perovskite CH3NH3PbI3

Qian

Yang

2016

Applied Physics Letters

104

107

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Great success has been achieved in improving the photovoltaic energy conversion efficiency of the organic-inorganic hybrid perovskite-based solar cells, but with very limited knowledge on the thermal transport in hybrid perovskites, which could affect the device lifetime and stability. Based on the potential field derived from the density functional theory calculations, we studied the lattice thermal conductivity of the hybrid halide perovskite CH3NH3PbI3 using equilibrium molecular dynamics simulations.Temperature-dependent thermal conductivity is reported from 160 K to 400 K, which covers the tetragonal phase (160 -330 K) and the pseudocubic phase (>330 K). A very low thermal conductivity (0.59 W/m·K) is found in the tetragonal phase at room temperature, whereas a much higher thermal conductivity is found in the pseudocubic phase (1.80 W/m·K at 330K). The low group velocity of acoustic phonons and the strong anharmonicity are found responsible for the relatively low thermal conductivity of the tetragonal CH3NH3PbI3.

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Tuning of the Thermoelectric Figure of Merit of CH₃NH₃MI₃ (M═Pb,Sn) Photovoltaic Perovskites

Cited by 160 publications

References 18 publications

Ultra-high Seebeck coefficient and low thermal conductivity of a centimeter-sized perovskite single crystal acquired by a modified fast growth method

Ultra-high Seebeck coefficient and low thermal conductivity of a centimeter-sized perovskite single crystal acquired by a modified fast growth method

Review—Organic Materials for Thermoelectric Energy Generation

Lattice thermal conductivity of organic-inorganic hybrid perovskite CH3NH3PbI3

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