Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity

Haque, Azimul; Kee, Seyoung; Villalva, Diego Rosas; Ong, Wee‐Liat; Baran, Derya

doi:10.1002/advs.201903389

Cited by 166 publications

(191 citation statements)

References 182 publications

(223 reference statements)

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“…While the power factor is moderate, ZT is enhanced by the ultra-low lattice thermal conductivity. Although there have been attempts to make thermoelectric devices using metal halide perovksites 8 , the performance has been limited thus far. A value of ZT = 0.14 was achieved for CsSnI 3 7 , with a similar ZT = 0.13 for CH 3 NH 3 SnI 3 6 .…”

Section: Thermoelectric Performance Predictionmentioning

confidence: 99%

“…A value of ZT = 0.14 was achieved for CsSnI 3 7 , with a similar ZT = 0.13 for CH 3 NH 3 SnI 3 6 . On the other hand Pbbased halide perovskites have shown negligible thermoelectric response 6,8 . The predicted ZT of Cs 3 Cu 2 I 5 is comparable to other emerging thermoelectric compounds.…”

Section: Thermoelectric Performance Predictionmentioning

confidence: 99%

“…Thus, low lattice thermal conductivity is one of promising design strategies for higher performing thermoelectric materials. We have been inspired by observations of the thermoelectric effect in halide perovskites [6][7][8] , where a record ZT of 0.14 was recently achieved 9 . However, there is a strong desire to move away from heavy and toxic elements such as Pb.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of high thermoelectric performance in the low-dimensional metal halide Cs3Cu2I5

et al. 2021

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Metal halides have emerged as a new generation of semiconductors with applications ranging from solar cells to chemical sensors. We assess the thermoelectric potential of Cs3Cu2I5, which has a crystal structure formed of zero-dimensional [Cu2I5]3− anionic clusters that are separated by Cs+ counter cations. We find the compound exhibits the characteristics of a phonon-glass electron-crystal with a large imbalance in the conduction of heat and electrons predicted from first-principles transport theory. Strong anharmonic phonon–phonon scattering results in short-lived acoustic vibrations and an ultra-low lattice thermal conductivity (<0.1 W m−1 K−1). The dispersive conduction band leads to a high electron mobility (>10 cm2 V−1 s−1). For an n-type crystal at 600 K, a thermoelectric figure-of-merit ZT of 2.6 is found to be accessible, which for a cold source of 300 K corresponds to a thermodynamic heat-to-electricity conversion efficiency of 15%.

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Section: Thermoelectric Performance Predictionmentioning

confidence: 99%

Section: Thermoelectric Performance Predictionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Prediction of high thermoelectric performance in the low-dimensional metal halide Cs3Cu2I5

et al. 2021

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“…In fact, so far the best thermoelectric performance achieved in the case of emerging halide perovskite‐based thermoelectrics is for inorganic Sn‐perovskites. [ 9–11 ]…”

Section: Introductionmentioning

confidence: 99%

Tuning the Thermoelectric Performance of Hybrid Tin Perovskites by Air Treatment

Haque

Hernandez

Davaasuren

et al. 2020

Adv Energy and Sustain Res

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With the advent of halide perovskites, a large number of electronic and optoelectronic devices have been demonstrated with exceptional performance, the most notable being solar cells. [1-3] The facile and cost-effective fabrication of perovskites, coupled with their multifunctional nature, makes them a viable material for future practical devices. Recently, the application of halide perovskites has been extended to thermoelectrics due to their ultralow thermal conductivity. Thermoelectric efficiency is defined by the dimensionless figure of merit, ZT where ZT ¼ σS 2 T/κ, and σ, S, T and κ are the electrical conductivity, Seebeck coefficient, absolute temperature, and thermal conductivity of the thermoelectric material, respectively. Minimizing the thermal conductivity and maximizing the power factor (PF) (defined as σS 2) is the general route of achieving high ZT. Although almost all halide perovskites exhibit ultralow thermal conductivity, the electrical conductivity has a huge variation depending on the metal cation. Lead (Pb)based perovskites have high Seebeck coefficient but very low electrical conductivity limiting their thermoelectric prospects. [4,5] On the other hand, Sn perovskites have high electrical conductivity arising from the oxidative nature of Sn 2þ. [6-8] Although this high conductivity is unfavorable for solar cells, it could be beneficial for thermoelectric applications. In fact, so far the best thermoelectric performance achieved in the case of emerging halide perovskite-based thermoelectrics is for inorganic Sn-perovskites. [9-11] Cesium tin halides, CsSnX 3 (X: halide) are continuously being pursued for thermoelectrics as they exhibit good electrical conductivity and ultralow thermal conductivity. To this end, hybrid Sn and binary Sn-Pb perovskites have received limited attention. Also, theoretical works have predicted methylammonium tin iodide (CH 3 NH 3 SnI 3) as a promising thermoelectric material. [12,13] Previous works probing the electrical conductivity and Seebeck of CH 3 NH 3 SnI 3 used single crystals or polycrystalline pellets as sample. [6,14,15] It is crucial to understand the transport behavior of CH 3 NH 3 SnI 3 in the form of thin films for facile device integration. In addition, the time scales and degree of oxidation leading to the observed metal-like behavior in Sn-perovskites constitutes an important issue. [15,16] In context to solar cells, a number of strategies have been used to stabilize Sn-perovskites such as the addition of SnF 2 , metallic Sn, ZnI 2 , and organic materials to mitigate the high carrier density which leads to solar cell failure. [17-20] So, understanding the oxidative behavior of Sn perovskites and control over it will be beneficial for thermoelectrics as well as solar cell research. In this work, a systematic study on the p doping of CH 3 NH 3 SnI 3 and Sn-Pb binary hybrid perovskite, CH 3 NH 3 Sn 0.75 Pb 0.25 I 3 due to air exposure is accomplished to tune their thermoelectric properties. A correlation between electronic stability and air exposure ...

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“…(Stoumpos et al, 2013;He and Galli, 2014;Dong et al, 2015 ) as illustrated in Figure 2 (a), and the manipulation of A, B and X sites leads to diverse material properties and unique opportunities. (Haque et al, 2020) Inorganic halide perovskites, CsPbX3,Cs4PbX6 and CsPb2X5 (X: Br or Cl) were first reported in the 1890s, (Wells, 1893) whilst hybrid organic-inorganic halide perovskites were first synthesized in late 1970s. (Weber, 1978) In recent years they have been developed…”

Section: Halide Perovskitesmentioning

confidence: 99%