Furfurylammonium as a Spacer for Efficient 2D Ruddlesden–Popper Perovskite Solar Cells

Zheng, Yi; Chen, Shan‐Ci; Ma, Yunlong; Zheng, Qingdong

doi:10.1002/solr.202200221

Cited by 10 publications

(7 citation statements)

References 47 publications

(54 reference statements)

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“…Planar PSCs with a structure of ITO/PEDOT:PSS/perovskite/PCBM/BCP/Ag were fabricated to study the photovoltaic performance of 2D perovskite films. Note that, when we prepared the manuscript, Zheng et al reported FuMAI for a 2D RP perovskite with the formula (FuMA) 2 (MA) 4 Pb 5 I 16 and achieved a PCE of 15.66% for n–i–p structured devices using an additive-assisted film-forming technique . As shown in Figure a, the THFMA-Pb device shows a PCE of 13.79%, with a current density ( J SC ) of 18.73 mA cm –2 , an open-circuit voltage ( V OC ) of 1.018 V, and a fill factor (FF) of 70.30%.…”

mentioning

confidence: 96%

“…Note that, when we prepared the manuscript, Zheng et al reported FuMAI for a 2D RP perovskite with the formula (FuMA) 2 (MA) 4 Pb 5 I 16 and achieved a PCE of 15.66% for n−i−p structured devices using an additive-assisted film-forming technique. 40 As shown in Figure 3a, the THFMA-Pb device shows a PCE of 13.79%, with a current density (J SC ) of 18.73 mA cm −2 , an open-circuit voltage (V OC ) of 1.018 V, and a fill factor (FF) of 70.30%. The optimized FuMA-Pb devices show a significantly enhanced J SC of 20.84 mA cm −2 , an improved V OC of 1.054 V, and a very notable FF of 81.95%, yielding an excellent PCE of 18.00% with negligible J−V hysteresis.…”

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confidence: 98%

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Spacer Engineering for 2D Ruddlesden–Popper Perovskites with an Ultralong Carrier Lifetime of Over 18 μs Enable Efficient Solar Cells

et al. 2022

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2D Ruddlesden–Popper (RP) perovskites have become emerging photovoltaic materials due to their outstanding optoelectronic properties and intrinsic structure stability. Here, two structurally similar organic spacers with conjugated and unconjugated unites, namely FuMA and THFMA, were developed to study their effects on the photophysical properties of 2D RP perovskites. A very important finding is that the 2D perovskite film (n = 4) based on FuMA with a conjugated furan unit exhibits an ultralong average carrier lifetime of 18.03 μs, which could be attributed to the enlarged dielectric constant, reduced exciton binding energy, and decreased electron–phonon coupling coefficients of the FuMA-based 2D RP perovskites. The optimized device based on the FuMA spacer achieves a high PCE of 18.00% with negligible hysteresis, much higher than that of the THFMA-based device (PCE = 13.79%). This work opens a new avenue for developing 2D RP perovskite films with ultralong carrier lifetimes for photovoltaic and other optoelectronic applications.

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confidence: 96%

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confidence: 98%

Spacer Engineering for 2D Ruddlesden–Popper Perovskites with an Ultralong Carrier Lifetime of Over 18 μs Enable Efficient Solar Cells

et al. 2022

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“…These results indicate that the grain size can be tailored by changing the molecular weight of the PEG additive, which is attributable to the impact of the PEG additive on the crystallization kinetics of the perovskite film . PEG is often considered a Lewis base due to the ether group C–O–C with lone-pair electrons and which allows the formation of Lewis acid–base interactions with the positively charged defects such as undercoordinated Pb 2+ in the CsPbI 2 Br perovskite, while Pb 2+ is regarded as a Lewis acid since Pb(II) halides prefer to accept iodide anions to form iodo-plumbate anions such as [Pb 3 I 10 ] 4– and [Pb 5 I 16 ] 6– . − The formed Lewis acid–base interaction between PEG and Pb 2+ allows us to tune the crystallization of the CsPbI 2 Br perovskites and further impacts the morphology and optoelectronic properties in perovskite films by changing the PEG molecular weight in the following aspects . First of all, the increase in the PEG molecular weight from 6k to 10k results in an increase in the nucleation energy barrier to reduce the quantity of the perovskite crystal nucleus .…”

Section: Resultsmentioning

confidence: 99%

Determining the Role of the Molecular Weight of Poly(Ethylene Glycol) Additives in Perovskite Photodetectors

Ran

Uddin

et al. 2022

ACS Appl. Energy Mater.

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The performance of perovskite photodetectors was often tuned by changing the functional groups of polymeric additives, rather than their molecular weight to improve defect passivation. As a result of the steric effect of polymeric additives, we found that the molecular weight of poly(ethylene glycol) (PEG) additives played an important role in determining the perovskite crystal size, which increased from 470 to 550 nm with increasing molecular weight from 6k to 10k but declined back to 450 nm with further increasing molecular weight to 20k. The noise current, rather than the external quantum efficiency, was the dominant factor that can be tailored to improve the photodetection performance using PEG additives with different molecular weights. The photodetectors based on the 10k PEG additive exhibited a high specific detectivity of 1.9 × 10 11 Jones, a linear dynamic range of 119 dB, and a frequency response −3 dB of 11.57 kHz. This work demonstrates an alternative approach by tailoring the molecular weight of polymeric additives to optimize the morphology of perovskite films for improved performance in perovskite photodetectors and other perovskite optoelectronic devices.

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“…Chen et al observed that replacing either MAI with MACl or PEAI with PEACl in precursor solutions of PEA ⟨ n ⟩ ≥ 6 RP halide perovskite significantly improved crystallinity, reduced defect density, and enhanced device stability in inert atmosphere . Other reports have also shown MACl to improve crystallinity and grain orientation. , …”

Section: Stability Of 3d and 2d Halide Perovskitesmentioning

confidence: 97%

“…524 Other reports have also shown MACl to improve crystallinity and grain orientation. 90,525 The A′-site itself can be engineered to improve film quality. Cheng et al incorporated amylammonium (AA + ) into PEA ⟨n⟩ ≥ 5 halide perovskites to relax residual strain in the lattice.…”

Section: Strengthen Interlayer Interactionsmentioning

confidence: 99%

Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

Metcalf,

Sidhik,

Zhang

et al. 2023

Chem. Rev.

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Three-dimensional (3D) organic–inorganic lead halide perovskites have emerged in the past few years as a promising material for low-cost, high-efficiency optoelectronic devices. Spurred by this recent interest, several subclasses of halide perovskites such as two-dimensional (2D) halide perovskites have begun to play a significant role in advancing the fundamental understanding of the structural, chemical, and physical properties of halide perovskites, which are technologically relevant. While the chemistry of these 2D materials is similar to that of the 3D halide perovskites, their layered structure with a hybrid organic–inorganic interface induces new emergent properties that can significantly or sometimes subtly be important. Synergistic properties can be realized in systems that combine different materials exhibiting different dimensionalities by exploiting their intrinsic compatibility. In many cases, the weaknesses of each material can be alleviated in heteroarchitectures. For example, 3D-2D halide perovskites can demonstrate novel behavior that neither material would be capable of separately. This review describes how the structural differences between 3D halide perovskites and 2D halide perovskites give rise to their disparate materials properties, discusses strategies for realizing mixed-dimensional systems of various architectures through solution-processing techniques, and presents a comprehensive outlook for the use of 3D-2D systems in solar cells. Finally, we investigate applications of 3D-2D systems beyond photovoltaics and offer our perspective on mixed-dimensional perovskite systems as semiconductor materials with unrivaled tunability, efficiency, and technologically relevant durability.

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Furfurylammonium as a Spacer for Efficient 2D Ruddlesden–Popper Perovskite Solar Cells

Cited by 10 publications

References 47 publications

Spacer Engineering for 2D Ruddlesden–Popper Perovskites with an Ultralong Carrier Lifetime of Over 18 μs Enable Efficient Solar Cells

Spacer Engineering for 2D Ruddlesden–Popper Perovskites with an Ultralong Carrier Lifetime of Over 18 μs Enable Efficient Solar Cells

Determining the Role of the Molecular Weight of Poly(Ethylene Glycol) Additives in Perovskite Photodetectors

Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

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