Groups-dependent phosphines as the organic redox for point defects elimination in hybrid perovskite solar cells

Wu, Zheng; Zhang, Miao; Liu, Yifan; Dou, Yuxi; Kong, Yinjie; Gao, Lin; Han, Weitao; Liang, Guijie; Zhang, Xiao Li; Huang, Fuzhi; Cheng, Yi‐Bing; Zhong, Jie

doi:10.1016/j.jechem.2020.05.047

Cited by 26 publications

(14 citation statements)

References 56 publications

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“…Halide perovskite solar cells (PSCs) have been in the spotlight in the photovoltaic field, profiting from their outstanding optoelectronic properties, low-cost fabrication, and simple processing technique. − In the last decade, the power conversion efficiency (PCE) of PSCs has rapidly enhanced to 25.2 from 3.8%. , Halide perovskite, as a light-absorption layer, is vital for highly efficient PSCs (efficiency >20%). However, inherent crystal defects are generated inside a polycrystalline perovskite film during perovskite film fabrication procedure and device operation process. , Although most defects give rise to shallow electronic states in bandgap edges, PSC devices are still confronted with the small number of deep trap states that are in charge of the nonradiative recombination centers in perovskite layers, damaging the optoelectronic properties of the device. − Simultaneously, many unstable factors (moisture, oxygen, and ultraviolet light) also originate from these defects, which greatly attenuates the stability of the photovoltaic device . Therefore, the key to efficient and stable PSCs is to reduce or passivate those defects.…”

Section: Introductionmentioning

confidence: 99%

“…Relevant studies reveal that uncoordinated ions, metallic Pb (Pb 0 ) and iodide (I 0 ), are the central deep-level trap states lying in perovskite films. , Also, the report exhibits that Pb 0 is the primary defect that deteriorates device performance and stability . Approaches, including composition engineering, film optimization engineering, additive engineering, ,,, and interfacial modification engineering, have been presented to reduce Pb 0 defects. Zhong et al employed organic phosphine redox pair as a Pb 0 and I 0 defects stabilizer.…”

Section: Introductionmentioning

confidence: 99%

“…Zhong et al employed organic phosphine redox pair as a Pb 0 and I 0 defects stabilizer. The relevant PSC gained enhanced performance and long-term stability . Zhou et al proved that introducing Eu 3+ -Eu 2+ redox pair into the PSC can effectively eliminate Pb 0 and I 0 defects, which greatly inhibited the degradation of PSC devices .…”

Section: Introductionmentioning

confidence: 99%

“…However, inherent crystal defects are generated inside a polycrystalline perovskite film during perovskite film fabrication procedure and device operation process. 6,7 Although most defects give rise to shallow electronic states in bandgap edges, PSC devices are still confronted with the small number of deep trap states that are in charge of the nonradiative recombination centers in perovskite layers, damaging the optoelectronic properties of the device. 8−11 Simultaneously, many unstable factors (moisture, oxygen, and ultraviolet light) also originate from these defects, which greatly attenuates the stability of the photovoltaic device.…”

Section: Introductionmentioning

confidence: 99%

“…The relevant PSC gained enhanced performance and long-term stability. 7 Zhou et al proved that introducing Eu 3+ -Eu 2+ redox pair into the PSC can effectively eliminate Pb 0 and I 0 defects, which greatly inhibited the degradation of PSC devices. 15 Qi et al found that pentaerythritol tetrakis(3-mercaptopropionate) can simultaneously passivate uncoordinated Pb 2+ and block the formation of Pb 0 defects.…”

Section: Introductionmentioning

confidence: 99%

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Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

Jia

Dong

Shi

et al. 2021

ACS Appl. Mater. Interfaces

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Passivating defects to suppress recombination is a valid tactic to improve the performance of third-generation perovskite-based solar cells. Pb0 is the primary defect in Pb-based perovskites. Here, tris(pentafluorophenyl)borane is inserted between the perovskite and spiro-OMeTAD layer in SnO2-based planar perovskite solar cells. The incorporation of tris(pentafluorophenyl)borane can effectively passivate Pb0 defects, decreasing recombination at the surface of the perovskite film. Additionally, the modification with tris(pentafluorophenyl)borane decreases the grain boundaries quantity in the perovskite film, enhancing the transportation capability of carriers. The resulting perovskite solar cell gets a high efficiency of 21.42%. While the reference device without tris(pentafluorophenyl)borane treatment acquires an efficiency of 19.07%. More importantly, the stability tests manifest that incorporating tris(pentafluorophenyl)borane in perovskite solar cells is conducive to the stability of the device.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

Jia

Dong

Shi

et al. 2021

ACS Appl. Mater. Interfaces

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Polyoxometalate Reinforced Perovskite Phase for High‐Performance Perovskite Photovoltaics

Huang,

Bi,

Yao

et al. 2024

Advanced Materials

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Ionic hybrid perovskites face challenges in maintaining their structural stability against non‐equilibrium phase degradation, therefore, it is essential to develop effective ways to reinforce their corner‐shared [PbI6]4− octahedral units. To strengthen structural stability, redox‐active functional polyoxometalates (POMs) are developed and incorporated into perovskite solar cells (PSCs) to form a robust polyoxometalates/perovskite interlayer for stabilizing the perovskite phase. This approach offers several advantages: 1) promotes the formation of an interfacial connecting layer to passivate interfacial defects in addition to stabilize the [PbI6]4− units through exchanged ammonium cations in POMs with perovskites; 2) facilitates continuous structural repairing of Pb0‐ and I0‐rich defects in the [PbI6]4− unit through redox electron shuttling of the electroactive metal ions in POMs; 3) provides guidance for selecting suitable redox mediators based on the kinetic studies of POM's effectiveness in reacting with targeted defects. The POM‐reinforced device maintains 97.2% of its initial PCE after 1500 h of shelf‐life test at 65 °C, while also enhancing the long‐term operational stability. Additionally, this approach can be generally applicable across scalable sizes and various bandgap perovskites in devices, showing the promise of using functional POMs to enhance perovskite photovoltaic performance.

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δ‐Phase Management of FAPbBr₃ for Semitransparent Solar Cells

Zhu

et al. 2023

Advanced Optical Materials

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ST-SCs due to proper band gap and stability. [4] However, the low PCE of FAPbBr 3 solar cells (SCs) seriously hinders their applications. Thus, many efforts have been made to improve the PCE of FAPbBr 3 SCs by additive engineering, [5] interface engineering, [6] and crystallization regulation. [7] For example, Ko et al. added cesium bromide to regulate lattice interactions of FAPbBr 3 with preferred orientation and obtained 8.56% of a PCE due to the highquality crystalline film. [8] Zhang et al. introduced guanidinium bromide to modulate the crystallization process, achieving a PCE of 8.92% with an open-circuit voltage (Voc) of 1.639 V for FAPbBr 3 SCs. [9] Liu et al. constructed 2D/3D perovskite interface by phenethylammonium bromide, which significantly passivated the interface defects and improved the PCE from 7.7% to 9.4%. [10] Although the PCE of FAPbBr 3 SCs has been improved, it is still unclear and rarely investigated on the effect of δ phase (δ-FAPbBr 3 ) on film and device properties. The photoinactive δ-FAPbBr 3 has a large band gap and chain structure, which may affect light absorption and carrier transport. [11] Therefore, the research on δ-FAPbBr 3 is of great significance for FAPbBr 3 SCs performance improvement.In this work, the key factors on the crystallization of δ-FAPbBr 3 and the effect of δ-FAPbBr 3 on device performance were systematically studied for the first time. The hydrophobic poly[bis(4phenyl) (2,4,6-trimethylphenyl) amine] (PTAA) underlayer induces random growth of δ-FAPbBr 3 and its aggregation at the bottom of the perovskite films, which bring more defects and hinder carrier transport. Contrarily, δ-FAPbBr 3 has more regular crystallization and uniform distribution on the hydrophilic (2-(9H-carbazol-9-yl) ethyl) phosphonic acid (2PACz) underlayer, which has less defect states and better carrier transport. By virtue of the management of δ-FAPbBr 3 and the passivation of the upper interface with a phosphonate/phosphine oxide dyad molecule (PE-TPPO), a PCE of 9.12% was obtained, which is the highest efficiency among the inverted FAPbBr 3 SCs. A ST-SC reached a LUE of 3.15% with a PCE of 7.44% and an AVT of 42.31%.

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Groups-dependent phosphines as the organic redox for point defects elimination in hybrid perovskite solar cells

Cited by 26 publications

References 56 publications

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

Polyoxometalate Reinforced Perovskite Phase for High‐Performance Perovskite Photovoltaics

δ‐Phase Management of FAPbBr₃ for Semitransparent Solar Cells

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Groups-dependent phosphines as the organic redox for point defects elimination in hybrid perovskite solar cells

Cited by 26 publications

References 56 publications

Postpassivation of Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3 Perovskite Films with Tris(pentafluorophenyl)borane

Postpassivation of Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3 Perovskite Films with Tris(pentafluorophenyl)borane

Polyoxometalate Reinforced Perovskite Phase for High‐Performance Perovskite Photovoltaics

δ‐Phase Management of FAPbBr3 for Semitransparent Solar Cells

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Product

Resources

About

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

Postpassivation of Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.83Br_0.17)₃ Perovskite Films with Tris(pentafluorophenyl)borane

δ‐Phase Management of FAPbBr₃ for Semitransparent Solar Cells