Efficient perovskite solar cells fabricated by manganese cations incorporated in hybrid perovskites

Liu, Wei; Chu, Liang; Liu, Nanjing; Ma, Yuhui; Hu, Ruiyuan; Weng, Yakui; Li, Hui; Zhang, Jian; Li, Xing’ao; Huang, Wei

doi:10.1039/c9tc03375k

Cited by 48 publications

(45 citation statements)

References 42 publications

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“…3 g). On the basis of the Kubelka–Munk theory [ 21 ], the bandgap of MAPbI 3 : x Rh (where x = 0, 0.5%, 1% and 5%) is determined to be 1.570, 1.58, 1.58 and 1.59 eV, respectively. From Figs.…”

Section: Resultsmentioning

confidence: 99%

“…3 i). The formula for calculating the Fermi energy level is E F = 21.22 − E B [ 21 ] (where E F is the Fermi level, and E B is high binding energy cutoff). The high binding energy cutoff of MAPbI 3 is 16.89 eV.…”

Section: Resultsmentioning

confidence: 99%

“…In total, 35 μL perovskite solution dipped on the SnO 2 layers and then spun at 4000 rpm for 20 s. In total, 300 μL chlorobenzene was dipped on the substrate to enhance the film quality when the spinning at 10 s. Then, the substrate was annealed at hot plate. The hole transporting layer Spiro-OMeTAD was spin coated as our previous work [ 21 ]. Finally, the PSCs were evaporated 150 nm Ag (0.8 Å s −1 ) with area of 0.09 cm 2 .…”

Section: Methodsmentioning

confidence: 99%

“…For example, doping with monovalent metal cations (Cu + , Ag + or Li +) was applied to reduce trap-state density [18,19], improved perovskite crystallinity and film quality, thus enhanced performance of PSCs. By doping bivalent cations (Mn 2+ , Co 2+ or Zn 2+ ), tuned electronic band structures and crystalline morphology were received and improved the stability of PSCs [20][21][22][23][24][25][26][27]. Trivalent metal cations (In 3+ , Eu 3+ and Al 3+ ) were often used to decrease deep defects, optimize film morphology and increase efficiency and stability of PSCs [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Perfection of Perovskite Grain Boundary Passivation by Rhodium Incorporation for Efficient and Stable Solar Cells

Liu

et al. 2020

Nano-Micro Lett.

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Organic cation and halide anion defects are omnipresent in the perovskite films, which will destroy perovskite electronic structure and downgrade the properties of devices. Defect passivation in halide perovskites is crucial to the application of solar cells. Herein, tiny amounts of trivalent rhodium ion incorporation can help the nucleation of perovskite grain and passivate the defects in the grain boundaries, which can improve efficiency and stability of perovskite solar cells. Through first-principle calculations, rhodium ion incorporation into the perovskite structure can induce ordered arrangement and tune bandgap. In experiment, rhodium ion incorporation with perovskite can contribute to preparing larger crystalline and uniform film, reducing trap-state density and enlarging charge carrier lifetime. After optimizing the content of 1% rhodium, the devices achieved an efficiency up to 20.71% without obvious hysteresis, from 19.09% of that pristine perovskite. In addition, the unencapsulated solar cells maintain 92% of its initial efficiency after 500 h in dry air. This work highlights the advantages of trivalent rhodium ion incorporation in the characteristics of perovskite solar cells, which will promote the future industrial application.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Perfection of Perovskite Grain Boundary Passivation by Rhodium Incorporation for Efficient and Stable Solar Cells

Liu

et al. 2020

Nano-Micro Lett.

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“…This is due to substitution of the Mn 2+ with isovalent Pb 2+ as the center atom in a [Pb(X) 6 ] 4octahedral (where X is Bror Cl -), causing distortion of the octahedral. [48] The effect of metal ions on surface morphology of perovskite thin film was further investigated with scanning electron microscope (SEM) as shown in Figure 3c,d. We first noticed that the pristine sample has fewer highly defined grain boundaries.…”

Section: Effects Of Mn Doping -Crystal Structure Morphology Trap Density and Energy Transfermentioning

confidence: 99%

The Multiple Roles of Metal Ion Dopants in Spectrally Stable, Efficient Quasi‐2D Perovskite Sky‐Blue Light‐Emitting Devices

Geng

Shivarudraiah

et al. 2021

Advanced Optical Materials

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These devices use perovskites with an ABX 3 structure as the active emitting layer, where A is Cs, MA or FA, B is Pb or Sn, and X is the halides. In recent years, the EQE for this device type has surged from less than 1% to over 20% for green, red and infra-red peLEDs. [7][8][9][10] Blue LEDs are also needed for displays and lighting applications, but thus far have lagged in EQE, color stability and lifetime, despite recent advances. [1] Blue (460 -480 nm) or sky-blue (480 -500 nm) peLEDs can be achieved by two possible methods: halide tuning, by adding chloride into a bromide-based perovskite (e.g., CsPbBr 3 ), [11,12] and more recently, through the quantum confinement effect, using 0D nanocrystals (NCs) [13][14][15][16][17][18][19] or quasi-2D layered perovskites. For example, You et al. reported a blue peLED incorporating EA into the Cs + site in PEA 2 (CsPbBr 3 ) 2 PbBr 4 to form passivated 2D/3D perovskite devices showing a record high EQE of 12.1% at 488 nm. [20] A key challenge for blue peLEDs is overcoming the issue of spectral (color) instability, especially when a mixed halide strategy is used to achieve blue emitting films. These perovskites, whether in the form of bulk, [21] quasi-2D, [22] or 0D nanocrystals, [23,24] often suffer from unwanted phasesegregation under photo-or electrical excitation, [25][26][27] in which the emission peak can shift or multiple peaks are observed due to ion migration. [28] Efforts to achieve spectral stability in blue peLEDs include A-site cation alloying, [29] tailoring bulky cations, [30,31] passivation, [32] and interface engineering. [33] Additionally, metal doping has long been investigated as an effective approach for enhancing perovskite optoelectronic performance, and this work has extended to peLEDs as well. [32,[34][35][36] Hou et al. reported a nanocrystal peLED doped with Mn that emitted at 466 nm with an EQE of 2.12%. [13] Most recently, Wang et al. reported yttrium (III) chloride doped quaisi-2D CsPbBr 3 :PEACl showing EQE of 11.0% and a maximum brightness of 9040 cd m -2 in the sky-blue region (roughly 485 -500 nm). [37] In this work, we investigate the activity of divalent metal ions as passivation materials in PEA-based 2D/3D CsPbX 3 perovskites, where X is mixed Br and Cl. The above Perovskite light-emitting devices (peLEDs) have recently gained widespread attention as candidates for next-generation display technologies.Red and green peLEDs have achieved over 20% external quantum efficiency (EQE), however blue peLEDs still lag behind. One proposed solution for improving the performance of blue peLEDs has been doping the perovskite films with metal ions, ostensibly to passivate surface trap sites and improve the EQE. Despite a few recent reports, however, the many roles of the metal ion dopants have not yet been fully explored. Here improvements in the EQE and spectral stability of quasi-2D perovskites, often called 2D/3D or layered perovskites are reported. CsPbBr 3−x Cl x skyblue emitting peLEDs, with a maximum EQE of 7.5%, and color stable spectra at ...

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Defects in Perovskite Solar Cells and Their Passivation Strategies

Feng,

Liang,

Fang

et al. 2023

ChemistrySelect

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Due to their excellent photoelectric conversion efficiency and low preparation cost, perovskite solar cells (PSCs) have attracted much attention from researchers and developed rapidly in the past decade. However, the stability and efficiency of perovskite photovoltaic devices still need to be improved for their practical applications. It is mainly because the perovskite thin films are inevitably defective to some extent (such as points defects and extrinsic defects), leading to the occurrence of non‐radiative recombination (NRR) inside the device and at the interface, which is closely related to the stability and efficiency of perovskite materials. Therefore, exploring reliable passivation strategies is essential to overcome the adverse effects of NRR losses of such point defects. Here, this article summarizes the perovskite solar cells, including the crystal structure and calculations of electronic properties of perovskites, composition, and principles of operation of perovskite solar cells, and more importantly, different passivation strategies, including Lewis acid‐base passivation, anionic and cationic passivation, polymer passivation, and alkyl halogen ammonium passivation for the defects involved in perovskite materials. The passivation effects of these strategies and their regulation mechanisms of point defects involving perovskite materials are also presented. We also discuss the intrinsic relationship between crystal defects and device stability and look forward to feasible defect passivation strategy options for future research.

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Efficient perovskite solar cells fabricated by manganese cations incorporated in hybrid perovskites

Abstract: Efficient perovskite solar cells fabricated by manganese cations incorporated in hybrid perovskites.

Cited by 48 publications

References 42 publications

Perfection of Perovskite Grain Boundary Passivation by Rhodium Incorporation for Efficient and Stable Solar Cells

Perfection of Perovskite Grain Boundary Passivation by Rhodium Incorporation for Efficient and Stable Solar Cells

The Multiple Roles of Metal Ion Dopants in Spectrally Stable, Efficient Quasi‐2D Perovskite Sky‐Blue Light‐Emitting Devices

Defects in Perovskite Solar Cells and Their Passivation Strategies

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