Colloidal Synthesis of Air-Stable Alloyed CsSn1–xPbxI3 Perovskite Nanocrystals for Use in Solar Cells

Liu, Feng; Ding, Chao; Zhang, Yaohong; Ripolles, Teresa S.; Kamisaka, Taichi; Toyoda, Taro; Hayase, Shuzi; Minemoto, Takashi; Yoshino, Kenji; Dai, Songyuan; Yanagida, Masatoshi; Noguchi, Hidenori

doi:10.1021/jacs.7b08628

Cited by 330 publications

(286 citation statements)

References 91 publications

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“…Distinctively, several research groups demonstrated that Sn‐Pb binary perovskites could achieve better material stability in comparison with pure Sn‐based perovskites and even pure Pb‐based perovskites . Encapsulated Sn‐rich perovskite PDs (MA 0.975 Rb 0.025 Sn 0.65 Pb 0.35 I 3 ) could remain the photocurrent and dark current density over 200‐day storage . There results highlight that Sn‐Pb binary perovskites might have superb material stability.…”

Section: Challenges Of Sn‐pb Binary Perovskitesmentioning

confidence: 97%

Crystallization, Properties, and Challenges of Low‐Bandgap Sn–Pb Binary Perovskites

Zhu

Choy

2018

Solar RRL

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Solution‐process and low‐temperature perovskites have motivated a broad range of interests and intensive studies for applications in solar cells (SCs) and photodetectors (PDs). Perovskite SCs with the bandgap of ≈1.5 eV currently exhibit the certified efficiency over 22% comparable with those of established thin film technologies. Meanwhile, perovskite PDs achieve superb performances in the visible region compared with commercial Si PDs. Partial substitution of Sn into Pb‐based perovskites can tune the absorption to near‐infrared (NIR) region, which would achieve an ideal‐bandgap perovskite approaching the Shockley–Queisser‐efficiency limit, low‐bandgap perovskite‐based bottom subcells in tandem devices (≈1.2 eV), and NIR photodetection. Here, various crystallization methods for growing low‐bandgap Sn–Pb binary perovskites are presented. Their impacts on morphology, crystallinity, preferred orientation, carrier lifetimes, Urbach energy, and stability of the resultant Sn–Pb binary perovskites are highlighted. Then, a description is given of single‐junction, 2‐terminal, and 4‐terminal SCs using these perovskites as absorbers, which achieve up‐to‐date efficiencies of 17.8%, 18.4%, and 21.2%, respectively. The current development of ultraviolet–visible–NIR PDs using these perovskites is also discussed. Furthermore, the challenges in controlling inter‐grain Sn/Pb element distributions and perovskite stability, which will influence performance and stability of Sn–Pb perovskite‐based devices, are presented. Finally, potential prospects are discussed for advancing low‐bandgap Sn–Pb binary perovskite‐based optoelectronic devices.

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Section: Challenges Of Sn‐pb Binary Perovskitesmentioning

confidence: 97%

Crystallization, Properties, and Challenges of Low‐Bandgap Sn–Pb Binary Perovskites

Zhu

Choy

2018

Solar RRL

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“…A study of alloyed ASn 1− x Pb x I 3 (A = Cs + , FA + , MA + or their combinations) produced in the form of NCs showed the mixed compounds to be much more stable to ambient air as compared to both ASnI 3 and APbI 3 individually [95–97]. The cation-exchange approach applied to produce FASn 1− x Pb x I 3 and FAPbI 3 from FASnI 3 is expected to be a general one and appropriate for the introduction of other isovalent and aliovalent cations such as Mn 2+ , Co 2+ , Bi 3+ , and Al 3+ into the sites of Sn 2+ or Pb 2+ [97].…”

Section: Reviewmentioning

confidence: 99%

Lead-free hybrid perovskites for photovoltaics

Stroyuk¹

2018

Beilstein J. Nanotechnol.

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This review covers the state-of-the-art in organo–inorganic lead-free hybrid perovskites (HPs) and applications of these exciting materials as light harvesters in photovoltaic systems. Special emphasis is placed on the influence of the spatial organization of HP materials both on the micro- and nanometer scale on the performance and stability of perovskite-based solar light converters. This review also discusses HP materials produced by isovalent lead(II) substitution with Sn2+ and other metal(II) ions, perovskite materials formed on the basis of M3+ cations (Sb3+, Bi3+) as well as on combinations of M+/M3+ ions aliovalent to 2Pb2+ (Ag+/Bi3+, Ag+/Sb3+, etc.). The survey is concluded with an outlook highlighting the most promising strategies for future progress of photovoltaic systems based on lead-free perovskite compounds.

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“…In this regard, we speculated that modification of B site metal cations may also be effective to improve further optoelectronic properties of hybrid perovskites as the elements at B site directly affect the band‐energy structure of perovskites . Although, the pioneering work on compositional engineering at B site has been done by Hayase group based on Pb‐Sn binary system, the studies regarding B site engineering is still scarcer than mixed compositions at A site because the candidates for B site cations such as Sn are extremely unstable in air by oxidization . Interestingly, addition of germanium (Ge) at B site cation has been recently reported to be effective for the improvement of both stability and PCE of all‐inorganic perovskite solar cells.…”

Section: Introductionmentioning

confidence: 99%

MACl‐Assisted Ge Doping of Pb‐Hybrid Perovskite: A Universal Route to Stabilize High Performance Perovskite Solar Cells

Kim

Ishii

Öz

et al. 2020

Advanced Energy Materials

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Interfacial engineering, grain boundary, and surface passivation in organic–inorganic hybrid perovskite solar cells (HyPSCs) are effective in achieving high performance and enhanced durability. Organic additives and inorganic doping are generally used to chemically modify the surface contacting charge transport layers, and/or grain boundaries so as to reduce the defect density. Here, a simple but tricky one‐step method to dope organic–inorganic hybrid perovskite with Ge for the first time is reported. Unlike Ge doping to all‐inorganic perovskites, application of GeI2 in organic–inorganic perovskite precursors is challenging due to the extremely poor solubility of GeI2 in hybrid perovskite ink, leading to failure in the formation of uniform films. However, it is found that addition of methylammonium chloride (MACl) into the precursor remarkably increases the solubility of GeI2. This MACl‐assisted Ge doping of hybrid perovskites produces high‐quality crystalline film with its surface passivated with nonvolatile GeI2 (GeO2) and the volatile MACl additive also improves the uniformity of GeO2 distribution in the perovskite films. The resulting Ge‐doped mixed cation and mixed halide perovskite films with composition FA0.83MA0.17Ge0.03Pb0.97(I0.9Br0.1)3 show superior photoluminescence lifetime, power conversion efficiency above 22%, and greater stability toward illumination and humidity, outperforming photovoltaic properties of HyPSCs prepared without the Ge doping.

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Colloidal Synthesis of Air-Stable Alloyed CsSn_1–xPb_xI₃ Perovskite Nanocrystals for Use in Solar Cells

Cited by 330 publications

References 91 publications

Crystallization, Properties, and Challenges of Low‐Bandgap Sn–Pb Binary Perovskites

Crystallization, Properties, and Challenges of Low‐Bandgap Sn–Pb Binary Perovskites

Lead-free hybrid perovskites for photovoltaics

MACl‐Assisted Ge Doping of Pb‐Hybrid Perovskite: A Universal Route to Stabilize High Performance Perovskite Solar Cells

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