Electronic properties of three- and low-dimensional semiconducting materials with Pb halide and Sn halide units

Koutselas, Ioannis; Ducasse, L; Papavassiliou, George C.

doi:10.1088/0953-8984/8/32/015

Cited by 60 publications

(100 citation statements)

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“…25 The Bohr radius of CH 3 NH 3 PbBr 3 is 20 Å. 26,27 Figure 1b shows a typical photoluminescence (PL) spectrum of MAPbBr 3 . The MAPbBr 3 film exhibits an emission peak at 547 nm, which is similar to previously reported observations 28 and is attributed to the NBE emission of MAPbBr 3 .…”

Section: Resultsmentioning

confidence: 99%

Highly stable and efficient solid-state solar cells based on methylammonium lead bromide (CH3NH3PbBr3) perovskite quantum dots

2015

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Easy processability and high stability are key features of methylammonium lead bromide (CH 3 NH 3 PbBr 3 )-based perovskite solar cells. The main focus of the present work was to fabricate and evaluate the stability of CH 3 NH 3 PbBr 3 quantum dot (QD)-based perovskite solar cells. We used an ex situ solution process to synthesize CH 3 NH 3 PbBr 3 QDs and then successfully fabricated mesoscopic solid-state perovskite solar cells. We also studied the influence of different CH 3 NH 3 PbBr 3 QD sizes and different holetransporting materials (HTMs), 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (spiro-MeOTAD) and poly[bis (4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), on the solar cell performance. The size of the CH 3 NH 3 PbBr 3 QDs was controlled by the solution processing parameters. Our controlled results show that spiro-MeOTAD-and PTAA-based devices exhibited, respectively, an open-circuit voltage (V OC ) of 0.991 and 1.091 V and a current density (J SC ) of 11.68 and 12.05 mA cm − 2 , which resulted in an average power conversion efficiency (PCE) of 7.35 and 9.44% under a standard 100 mW cm − 2 illumination without masking. Our best-performing cell, which contains the FTO/Bl-TiO 2 /mp-TiO 2 +CH 3 NH 3 PbBr 3 (~2-nm QDs)/PTAA/Au configuration shows the following results: open-circuit voltage (V OC ) = 1.110 V, current density (J SC ) = 14.07 mA cm − 2 , fill factor = 0.73 and an 11.40% PCE. Furthermore, the CH 3 NH 3 PbBr 3 -based devices are stable for more than four months.

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Section: Resultsmentioning

confidence: 99%

Highly stable and efficient solid-state solar cells based on methylammonium lead bromide (CH3NH3PbBr3) perovskite quantum dots

2015

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“…We note that such ligands had been used previously to fabricate 2D or quasi-2D layered perovskite materials in the early 90s. [39][40][41][42][43] The NC dispersions were stable for at least 3 months. The absorption and PL peaks of these highly crystalline (Figure 2a) MAPbBr 3 NCs were at 527 and 530 nm, respectively (Figure 2b), with a PLQY of~20%.…”

Section: Synthesis Of Perovskite Ncsmentioning

confidence: 96%

“…It was found out that for these highly confined 2D systems, the exciton binding energy reaches several hundreds of meV, similar to values for bulk layered perovskites. 43,88,89 Thus, it is possible to tune the optical properties of perovskite nanoplatelets by controlling the number of layers. Similar effects have been also reported by other groups.…”

Section: Quantum Confinement In Perovskite Ncsmentioning

confidence: 99%

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

et al. 2016

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Lead halide perovskite nanocrystals (NCs) are receiving a lot of attention nowadays, due to their exceptionally high photoluminescence quantum yields reaching almost 100% and tunability of their optical band gap over the entire visible spectral range by modifying composition or dimensionality/size. We review recent developments in the direct synthesis and ion exchange-based reactions, leading to hybrid organic-inorganic (CH 3 NH 3 PbX 3 ) and all-inorganic (CsPbX 3 ) lead halide (X = Cl, Br, I) perovskite NCs, and consider their optical properties related to quantum confinement effects, single emission spectroscopy and lasing. We summarize recent developments on perovskite NCs employed as an active material in several applications such as light-emitting devices, solar cells and photodetectors, and provide a critical outlook into the existing and future challenges.

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“…Only a few of them are based on tin-halide compounds (see for example [1,3,5,[13][14][15]21]). The reported compounds were characterized as three-dimensional (3D) semiconductors of the type (SC)MX 3 , twodimensional (2D) or monolayer (n=1) of the type (BC) 2 MX 4 semiconductors and quasi-twodimensional (q-2D) bilayer or multilayer (n≥2) semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Effects of organic moieties on the photoluminescence spectra of perovskite-type tin bromide based compounds

Papavassiliou

Vidali

Pagona

et al. 2015

Journal of Physics and Chemistry of Solids

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Electronic properties of three- and low-dimensional semiconducting materials with Pb halide and Sn halide units

Abstract: On page 1223, first paragraph, the values for the theoretically estimated binding energy, Bohr radius and Eb(2D) should be 285 meV, 11.5 Å and 9.82 Eb(3D), rather than 191 meV, 14.2 Å and 6.58 Eb(3D), respectively.

Cited by 60 publications

References 0 publications

Highly stable and efficient solid-state solar cells based on methylammonium lead bromide (CH3NH3PbBr3) perovskite quantum dots

Highly stable and efficient solid-state solar cells based on methylammonium lead bromide (CH3NH3PbBr3) perovskite quantum dots

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

Effects of organic moieties on the photoluminescence spectra of perovskite-type tin bromide based compounds

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