Dredging the Charge‐Carrier Transfer Pathway for Efficient Low‐Dimensional Ruddlesden‐Popper Perovskite Solar Cells

Li, Pengwei; Yan, Linfang; Cao, Qingli; Liang, Chao; Zhu, He; Peng, Sihui; Yang, Yongpeng; Liang, Yuncai; Zhao, Rudai; Zang, Shuang‐Quan; Zhang, Yiqiang; Song, Yanlin

doi:10.1002/anie.202217910

Cited by 24 publications

(19 citation statements)

References 45 publications

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“…Meanwhile, the adjacent inorganic slabs are linked to the terminal amino group of the cation by strong N–H···Br hydrogen bonds (Figure , right). Moreover, strong O–H···O (∼1.633 Å) hydrogen-bond interactions are formed between the different organic spacers, eliminating the VdW gaps in 1 , which provides a reliable way to improve the carrier mobility of 2D hybrid perovskites. , …”

Section: Resultsmentioning

confidence: 99%

“…Compared to the common layered which provides a reliable way to improve the carrier mobility of 2D hybrid perovskites. 44,45 In compound 1, the carboxyl group, an unsaturated functional group, was introduced by using alanine as the organic cation. The adjacent carboxyl groups through strong O−H•••O hydrogen bonds form the cross-linked structure to improve the connectivity of the organic layers, creating a "channel" to allow more efficient charge transfer in organic layers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Pioneering Two-Dimensional Perovskites Featuring Four-Layer Organic Spacers for Polarization-Sensitive Photodetection

Wu,

Xu,

Dong

et al. 2023

ACS Appl. Mater. Interfaces

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Hybrid perovskites have great potential in photovoltaics and photodetection. Specially, two-dimensional (2D) hybrid perovskites have been discovered to show distinctive applications in polarization-sensitive photodetection due to their intrinsic anisotropy. Herein, we designed a new type of 2D perovskite by introducing bifunctional alkylammonium as an organic spacer, (β-Ala)4PbBr4 (1, where β-Ala+ is 3-aminopropanoic), which has four organic spacers in adjacent inorganic layers and adjacent organic layers are linked by hydrogen bonding. The pioneering structure with four organic spacers enables an intrinsic high strong anisotropy, facilitating polarization-sensitive detection. The analysis of the crystal structure and optical properties further elucidates the natural anisotropic properties of 1. Strikingly, 1 has a strong optical dichroism (αc/αb ≈ 7.4 in 405 nm), and the polarization-sensitive detector on single crystals of 1 exhibits a large polarization ratio (I max/I min ≈ 2.0). This result highlights that the employment of bifunctional cations is efficient to explore new type 2D perovskites for potentially high-performance polarization-sensitive detection.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Pioneering Two-Dimensional Perovskites Featuring Four-Layer Organic Spacers for Polarization-Sensitive Photodetection

Wu,

Xu,

Dong

et al. 2023

ACS Appl. Mater. Interfaces

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“…reported a "charged-bridge" mechanism for charge transfer through the spacing region by introducing 𝛾-aminobutyric acid (GABA) as a spacer, which improves the out-of-plane charge transport. [86] Non-radiative Auger recombination is the primary reason for luminescence quenching in pure 2D perovskite LEDs, which can be suppressed by reducing local carrier density. An effective approach to reduce local carrier density is to increase the width of quantum wells by tuning the ratio of large and small organic cations in the precursor solution.…”

Section: Optoelectronic Propertiesmentioning

confidence: 99%

“…reported a “charged‐bridge” mechanism for charge transfer through the spacing region by introducing γ ‐aminobutyric acid (GABA) as a spacer, which improves the out‐of‐plane charge transport. [ 86 ]…”

Section: Crystal Structure and Properties Of 2d Perovskitementioning

confidence: 99%

Recent Advances and Opportunities in Low‐Dimensional Layered Perovskites for Emergent Applications beyond Photovoltaics

Ghosh

Parveen

Sellin

et al. 2023

Adv Materials Technologies

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Layered metal halide perovskites have attracted enormous research attention over the last few years, befitting their unique optical and electronic properties. Low‐dimensional layered perovskites demonstrate great potential for various optoelectronic and sensing applications beyond photovoltaics. Herein, the recent progress and opportunities in 2D and quasi‐2D perovskites for light‐emitting diodes (LEDs), lasers, memristors, neuromorphic/synaptic applications, UV–vis photodetection, X‐ray detection, scintillators, and photocatalytic applications are reviewed. First, the crystal structure, characteristics, and fundamental properties of 2D layered perovskites are discussed. Recent efforts and developments of 2D and quasi‐2D metal halide perovskite for light‐emitting applications with excellent luminescence properties are reviewed. Unique properties of 2D perovskites, such as negligible leakage current due to restricted carrier transport, high stability, and hydrophobicity, make them viable for memristor devices. After discussing the memristor and neuromorphic devices using 2D perovskites, the outstanding performance of 2D perovskites in UV–vis photodetection including polarization‐sensitive photodetection is discussed. 2D perovskites recently proved as a superior candidate in X‐ray detection with high stability. Further, the scintillation properties of 2D perovskites for the detection of ionizing radiation are discussed. Finally, some of the very recent achievements and present future outlook, including exciting opportunities in this burgeoning field are highlighted.

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“…Moreover, the formation of two‐dimensional (2D) perovskite is not limited by the Goldschmidt tolerance factor, which allows preparation of multifunctional perovskite materials using a wider range of spacer cations [17] . However, the large exciton binding energy, wide band gap and low charge mobility arising from the insulating bulky organic cations limit the device efficiency [18–20] …”

Section: Introductionmentioning

confidence: 99%

Electron Acceptor Molecule Doping Induced π–π Interaction to Promote Charge Transport Kinetics for Efficient and Stable 2D/3D Perovskite Solar Cells

Wang

Chang

et al. 2023

Angew Chem Int Ed

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Although the incorporation of 2D perovskite into 3D perovskite can greatly enhance intrinsic stability, power conversion efficiency (PCE) of 2D/3D perovskite is still inferior to its 3D counterpart due to poor carrier transport kinetics resulted from the quantum and dielectric confinement of 2D component. To overcome this issue, the electron acceptor molecule 1,2,4,5‐tetracyanobenzene (TCNB) was introduced to trigger intermolecular π–π interaction in 2D perovskite along with the electronic doping of 2D/3D perovskite to improve charge transfer efficiency. By virtue of high electron affinity, TCNB can undergo electron transfer reaction and subsequently establish π–π interaction with 1‐naphthalenemethylammonium (NMA) cations, greatly strengthening lattice rigidity and reducing exciton binding energy. Transmission electron microscopy results demonstrate that 2D phases are mainly distributed at grain boundaries, reducing defect density and weakening nonradiative recombination. Meanwhile, the p‐type doping of perovskite by TCNB optimizes energy level alignment at perovskite/hole transport layer interface. Consequently, PCE of champion device is significantly boosted to 24.01 %. The unencapsulated device retains an initial efficiency close to 94 % after exposure to ambient environment for over 1000 h. This work paves a novel path for designing new mixed‐dimensional perovskite solar cells with high PCE and superior stability.

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Dredging the Charge‐Carrier Transfer Pathway for Efficient Low‐Dimensional Ruddlesden‐Popper Perovskite Solar Cells

Cited by 24 publications

References 45 publications

Pioneering Two-Dimensional Perovskites Featuring Four-Layer Organic Spacers for Polarization-Sensitive Photodetection

Pioneering Two-Dimensional Perovskites Featuring Four-Layer Organic Spacers for Polarization-Sensitive Photodetection

Recent Advances and Opportunities in Low‐Dimensional Layered Perovskites for Emergent Applications beyond Photovoltaics

Electron Acceptor Molecule Doping Induced π–π Interaction to Promote Charge Transport Kinetics for Efficient and Stable 2D/3D Perovskite Solar Cells

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