Dimensional Engineering Enables 1.31 V Open‐Circuit Voltage for Efficient and Stable Wide‐Bandgap Halide Perovskite Solar Cells

Yu, Yue; Li, Rui; Liu, Chang; Hou, Tian; Zhang, Meng; Yu, Hua

doi:10.1002/solr.202200021

Cited by 5 publications

(6 citation statements)

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“…The composition of WBG perovskite in this work is Cs 0.2 FA 0.8 Pb(I 0.7 Br 0.3 ) 3 , deposited by a one‐step method. [ 20 ] Its optical bandgap ( E g ) is ≈1.75 eV, as shown in Figure S1 in the Supporting Information. For the FPEAI‐added sample, 1.5 mol% FAI was substituted by FPEAI in the perovskite precursor.…”

Section: Resultsmentioning

confidence: 99%

Synergetic Regulation of Oriented Crystallization and Interfacial Passivation Enables 19.1% Efficient Wide‐Bandgap Perovskite Solar Cells

Liu

et al. 2022

Advanced Energy Materials

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show promising applications in buildingintegrated photovoltaics and Internet of Things. [4] Despite their numerous studies, WBG PSCs still suffer from severe opencircuit voltage loss (V loss ) and instability. Extensive investigations indicate that the rigorous V loss is attributed to high-density defects and photoinduced phase segregation. [5] The polycrystalline perovskite films prepared by solution methods have numerous defects at grain boundaries, surface, and perovskite bulk, [6] which act as trapping sites that cause strong nonradiative recombination. The nonradiative recombination decreases the steady-state charge density and reduces the splitting of quasi-Fermi levels, finally leading to a relatively large V loss . [7] Besides, surface defects at grain boundary provide channels for moisture invasion as well as ion migration, resulting in detrimental stability. [8] Various strategies including additive engineering, [9] composition engineering, [10] solvent engineering, [11] and interface engineering, [5b] are effectively employed to fabricate high-efficiency WBG PSCs. Among them, using additives in perovskite precursors is a common method to fabricate highquality WBG PSCs. The functions of additives are mainly to improve the film quality, [12] passivate defects, [13] and inhibit phase segregation. [14] For example, Yan and co-workers reported that lead thiocyanate additive can availably increase the grain size to 1 µm and enhance the crystallinity of WBG perovskite films. [11] Recently, 2D/3D heterostructure formed by interfacial passivation attracts great attention for WBG PSCs with high power conversion efficiency (PCE) and superior stability. [5a,15] A 2D/3D heterostructure, formed by depositing large organic cation onto 3D WBG perovskite, can efficaciously passivate the surface defect, [16] block ion migration, [17] and enhance the stability of WBG PSCs. [18] Furthermore, the optimized energylevel arrangement of the 2D/3D heterostructure can decrease the V loss . [5a,19] To date, most of the reported studies focus on one single strategy to modify either perovskite crystallization or interface passivation, or others. Therefore, it is of great interest to develop synergetic strategies to regulate the crystallization and defect passivation for achieving highly efficient WBG PSCs.In this study, we introduce a dual-functional agent of 4-fluorophenylethylammonium iodide (FPEAI) to achieve synergetic modulation of perovskite crystallization and comprehensive Wide-bandgap (WBG) perovskite solar cells (PSCs) suffer from severe voltage loss, which significantly limits the enhancement of photovoltaic performance. Here, 4-fluoro-phenylethylammonium iodide (FPEAI) is used as a dualfunctional agent for oriented crystallization and comprehensive passivation of WBG PSCs. The additive of FPEAI promotes crystals to grow along with the (100) orientation with improved crystallinity and to spontaneously form Ruddlesden-Popper 2D perovskite on the grain boundary and surface of 3D crystals, which can passivate defect...

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Section: Resultsmentioning

confidence: 99%

Synergetic Regulation of Oriented Crystallization and Interfacial Passivation Enables 19.1% Efficient Wide‐Bandgap Perovskite Solar Cells

Liu

et al. 2022

Advanced Energy Materials

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“…In light of the unique properties of PEA spacers, 64,65 researchers have explored the molecular structure and extended the use of phenyl spacers such as benzylammonium (BnA), 66 phenylbutylammonium (PBA), 67 4-fluorophen-ethylammonium (FPEA), 68,69 and pentafluorophenylethylammonium (FEA), 32 among others. 33,35,70–74 In 2019, Grätzel et al employed FEA in highly efficient bilayer 2D/3D PSCs and successfully demonstrated the dominant generation of 2D perovskite on the surface of the 2D/3D bilayer through X-ray reflectivity (XRR) and grazing incidence X-ray diffraction (GIXRD) characterization.…”

Section: D/3d Heterojunctions In Mixed Dimensional Perovskite Solar C...mentioning

confidence: 99%

“…In light of the unique properties of PEA spacers, 64,65 researchers have explored the molecular structure and extended the use of phenyl spacers such as benzylammonium (BnA), 66 phenylbutylammonium (PBA), 67 4-fluorophen-ethylammonium (FPEA), 68,69 and pentafluorophenylethylammonium (FEA), 32 among others. 33,35,[70][71][72][73][74] system undergoing photochemical cross-linking under UV photoexcitation (B250 nm) to produce new covalent bonds when forming 2D perovskites.…”

Section: Surface Treatment Modelmentioning

confidence: 99%

The role of organic spacers in 2D/3D hybrid perovskite solar cells

Zou,

Gao,

Liu

2024

Mater. Chem. Front.

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“…The general trend observed is that the shunt resistance and V oc of devices decrease with decreasing work function of the back contact. [ 89,96,97 ]…”

Section: General Architecture Of Solar Cellsmentioning

confidence: 99%

“…The general trend observed is that the shunt resistance and V oc of devices decrease with decreasing work function of the back contact. [89,96,97] Concerning the carbon electrode, some strategies have been used to tune the W f and improve the solar cell performance. Thus, CuPc nanoparticles have upshifted the W f of carbon electrodes, increasing the V oc and hole extraction.…”

Section: General Architecture Of Solar Cellsmentioning

confidence: 99%

Advances in Carbon Materials Applied to Carbon‐Based Perovskite Solar Cells

et al. 2023

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Perovskite‐based solar cells (PSCs) are some of the most promising devices for capturing photovoltaic energy. Efficiency has increased from single digits to a certified 25.7%, an unprecedented improvement for any solar cell technology. Incorporating carbon materials into perovskite solar cells promises to be revolutionary in the solar cell field by increasing stability, decreasing manufacturing costs, and making them attractive for commercialization. Here, an overview of the advances in carbon‐based perovskite solar cells (C–PSCs) that incorporate different carbon materials as back contact on different device architectures is presented. An overview of PSC architectures and high‐ and low‐temperature C–PSCs is provided. Additionally, recent advances in the main carbon materials applied in the field, such as graphene, carbon nanotubes, carbon dots, and biocarbon, are presented. Finally, a summary of carbon materials applied to C–PSCs is provided.

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Dimensional Engineering Enables 1.31 V Open‐Circuit Voltage for Efficient and Stable Wide‐Bandgap Halide Perovskite Solar Cells

Abstract: Figure 7. a) Normalized PCE of the unencapsulated devices in the N 2 glove box at 50 C. b) Normalized PCE of the unencapsulated devices under 25% AE 10% relative humidity (RH).

Cited by 5 publications

References 53 publications

Synergetic Regulation of Oriented Crystallization and Interfacial Passivation Enables 19.1% Efficient Wide‐Bandgap Perovskite Solar Cells

Synergetic Regulation of Oriented Crystallization and Interfacial Passivation Enables 19.1% Efficient Wide‐Bandgap Perovskite Solar Cells

The role of organic spacers in 2D/3D hybrid perovskite solar cells

Advances in Carbon Materials Applied to Carbon‐Based Perovskite Solar Cells

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