All-solid Sn/Pb halide perovskite sensitized solar cells

Ogomi, Yuhei; Morita, Akane; Tsukamoto, Shota; Saitho, Takahiro; Fujikawa, Naotaka; Shen, Qing; Toyoda, Taro; Yoshino, Kenji; Pandey, Shyam S.; Ma, Tingli; Hayase, Shuzi

doi:10.1109/pvsc.2014.6925439

Cited by 83 publications

(135 citation statements)

References 16 publications

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“…23,25 The underlying mechanism for the anomaly, however, is still poorly understood, but it can be compared with similar effects observed in the MA 1-x FA x PbI 3 where the cation size indirectly determines the bandgap of the perovskite. 26 Interestingly, Ogomi et al reported a monotonic behavior in the similar system, 24 which is contradict to the nonmonotonic bandgap behavior. Thus, an in-depth study for the underlying principle of the non-monotonic behavior is required to understand the system clearly.…”

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confidence: 96%

“…22 In recent reports, such a strategy has been achieved in the hybrid halide perovskite system, CH 3 NH 3 Sn 1-x Pb x I 3 , showing that bandgap can be reduced to E g = 1.17 eV by alloying Sn and Pb atoms at the metal site of perovskite. 23, 24 The measured bandgaps in the CH 3 NH 3 Sn 1-x Pb x I 3 solid solution show surprising non-monotonic characteristics with x, and a minimum bandgap value emerges in the intermediate compounds with x = 0.25 and x = 0.5. Remarkably, the bandgaps at x = 0.25-0.5 are lower than the parent endmember with the smallest bandgap CH 3 NH 3 SnI 3 (E g = 1.3 eV).…”

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confidence: 98%

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Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH₃NH₃Sn_1–xPb_xI₃

Stoumpos

Jin

et al. 2015

J. Phys. Chem. Lett.

218

229

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Halide perovskite solar cells are a recent ground-breaking development achieving power conversion efficiencies exceeding 18%. This has become possible owing to the remarkable properties of the AMX3 perovskites, which exhibit unique semiconducting properties. The most efficient solar cells utilize the CH3NH3PbI3 perovskite whose band gap, Eg, is 1.55 eV. Even higher efficiencies are anticipated, however, if the band gap of the perovskite can be pushed deeper in the near-infrared region, as in the case of CH3NH3SnI3 (Eg = 1.3 eV). A remarkable way to improve further comes from the CH3NH3Sn1-xPbxI3 solid solution, which displays an anomalous trend in the evolution of the band gap with the compositions approaching x = 0.5 displaying lower band gaps (Eg ≈ 1.1 eV) than that of the lowest of the end member, CH3NH3SnI3. Here we use first-principles calculations to show that the competition between the spin-orbit coupling (SOC) and the lattice distortion is responsible for the anomalous behavior of the band gap in CH3NH3Sn1-xPbxI3. SOC causes a linear reduction as x increases, while the lattice distortion causes a nonlinear increase due to a composition-induced phase transition near x = 0.5. Our results suggest that electronic structure engineering can have a crucial role in optimizing the photovoltaic performance.

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confidence: 96%

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confidence: 98%

Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH₃NH₃Sn_1–xPb_xI₃

Stoumpos

Jin

et al. 2015

J. Phys. Chem. Lett.

218

229

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“…The Urbach energy of SnPb-2 layer showed lower energy (20 meV) than that of SnPb-1 (50 meV), suggesting that the former may have lower crystal disordering and defect density than SnPb-1 layer. 24,25 The grain size of SnPb-2 was much larger than that of SnPb-1, and the former covered the surface of porous titania layer fully as shown in Fig. 3.…”

Section: Snpb Perovskite Solar Cells 1415mentioning

confidence: 95%

Research following Pb Perovskite Solar Cells

Hayase

2017

Electrochemistry

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Certified efficiency of Pb perovskite solar cells with mixed cations is reported to be 19.6% (1 cm 2 ). One of the recent research interests is on enhancing the solar cell efficiency further. Band gap of the present Pb perovskite is about 1.55 eV. Supposing that Voc loss is 0.4 eV, the best efficiency is obtained by using perovskite with about 1.4 eV band gap. One of the candidates for the narrow band gap perovskite material is SnPb mixed metal perovskite. In this paper, the relationship between Voc losses and hetero-interface structures is discussed in detail, leading to the conclusion that hetero-interface structures give serious effects on the solar cell efficiency. It is reported that the efficiency was enhanced from about 5% to 16% after optimization of the hetero-interface structure. In addition, research trend on Pb free perovskite solar cells consisting of Sn or Bi, which is another recent research interest, is also reviewed.

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“…The flow diagram of the whole experiment procedure is shown in Fig. 3a (Ogomi et al, 2014;Bradley, 2015). Figure 3b shows the stability of this perovskite in the air with and without PbI 2 .…”

Section: Synthesis Of Cocktail Pscmentioning

confidence: 99%

“…Meanwhile, when PbI 2 is incorporated in the compound, the 900 nm absorption is relatively stable in air. The efficiency of this PSC is reported to be 14.4% (Ogomi et al, 2014). Room temperature PL (excited at 325 nm) spectra of ZnO-NA and ZC-NA samples Synthesis of CH 3 NH 3 PbBr 3 (Bromine-based)…”

Section: Synthesis Of Cocktail Pscmentioning

confidence: 99%

Recent Advances in Fabrication Techniques of Perovskite Solar Cells: A Review

Ehtesham¹,

Wong²,

Wong³

et al. 2016

American Journal of Applied Sciences

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Abstract:In this study, thorough review is performed on various reported fabrication techniques of the Perovskite Solar Cell (PSC) and the Hole Transport Materials (HTM) layer, in order to provide a critical insight on the direction for further advancement in related fields as well as a better understanding on the device physics. So far, the best short-circuit current density of 22.9 mA/cm 2 has been reported in CH 3 NH 3 PbI 3-x Cl x scaffold by TiCl 4 nanorods treated by NRS and the best open circuit voltage of 0.763V has been reported in TiO 2 /perovskite/spiro-OMeTAD/Au. On the other hand, so far the highest PCE of the PSCs reported in the literature is 19.3%. Interestingly, PSC with 200nm mesoporous TiO 2 has been reported to achieve PCE value of 16.46%. A 5-layer TiO 2 /perovskite/spiroOMeTAD/Au integrated with 40 nm ZnO thin film has been reported to achieve Fill Factor (FF) of 76%. Although promising data has been obtained through numerous researches, there are still many other optimizations yet to be done before mass commercialization of PSC is possible. Optimizing the fabrication process of carrier transport material as well as the incorporation of sensitizer into the device structure are the key aspects that should be focused on in future researches.

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All-solid Sn/Pb halide perovskite sensitized solar cells

Cited by 83 publications

References 16 publications

Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH₃NH₃Sn_1–xPb_xI₃

Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH₃NH₃Sn_1–xPb_xI₃

Research following Pb Perovskite Solar Cells

Recent Advances in Fabrication Techniques of Perovskite Solar Cells: A Review

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All-solid Sn/Pb halide perovskite sensitized solar cells

Cited by 83 publications

References 16 publications

Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH3NH3Sn1–xPbxI3

Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH3NH3Sn1–xPbxI3

Research following Pb Perovskite Solar Cells

Recent Advances in Fabrication Techniques of Perovskite Solar Cells: A Review

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Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH₃NH₃Sn_1–xPb_xI₃

Antagonism between Spin–Orbit Coupling and Steric Effects Causes Anomalous Band Gap Evolution in the Perovskite Photovoltaic Materials CH₃NH₃Sn_1–xPb_xI₃