Multifunctional 2D perovskite capping layer using cyclohexylmethylammonium bromide for highly efficient and stable perovskite solar cells

Wang, Shibo; Cao, Fengxian; Wu, Yunjia; Zhang, Xiuchun; Zou, Jinjun; Lan, Zhang; Sun, Weihai; Gao, Peng

doi:10.1016/j.mtphys.2021.100543

Cited by 16 publications

(28 citation statements)

References 61 publications

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“…Figure 2b shows the N 1s spectra; it is a signature peak for the presence of the ammonium group (from FAI and MABr) in the perovskite. The control perovskite exhibited only one N 1s peak at 402.2 eV (assigned −NH 3 ), 2 which is shifted to 402.05 eV for the TDDAB-modified film. 2 Besides, the modified perovskite exhibited a peak at 400.0 eV (assigned to −NH 2 ) compared to 400.2 eV for the control films.…”

Section: Resultsmentioning

confidence: 99%

“…The control perovskite exhibited only one N 1s peak at 402.2 eV (assigned −NH 3 ), 2 which is shifted to 402.05 eV for the TDDAB-modified film. 2 Besides, the modified perovskite exhibited a peak at 400.0 eV (assigned to −NH 2 ) compared to 400.2 eV for the control films. 2 The N 1s peak position change could demonstrated the interaction between CsFAMA and TDDAB (Br − ) through hydrogen bonding to modify the halide defects.…”

Section: Resultsmentioning

confidence: 99%

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Surface Capping Layer Prepared from the Bulky Tetradodecylammonium Bromide as an Efficient Perovskite Passivation Layer for High-Performance Perovskite Solar Cells

Abate

Jha

et al. 2022

ACS Appl. Mater. Interfaces

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The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has increased and levels with silicon solar cells; however, their commercialization has not yet been realized because of their poor long-term stability. One of the primary causes of the instability of PSC devices is the large concentration of defects in the polycrystalline perovskite film. Such defects limit the device performance besides triggering hysteresis and device instability. In this study, tetradodecylammonium bromide (TDDAB) was used as a postsurface modifier to suppress the density of defects from the mixed perovskite film (CsFAMA). X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) analyses validated that TDDAB binds to the mixed perovskite through hydrogen bonding. The X-ray diffraction (XRD) and two-dimensional grazing incidence wide-angle X-ray scattering (2D GIWAXS) study uncovered that the TDDAB modification formed a capping layer of (TDDA)2PbI1.66Br2.34 on the surface of the three-dimensional (3D) perovskite. The single charge transport device prepared from the TDDAB-modified perovskite film revealed that both the electron and hole defects were considerably repressed due to the modification. Consequently, the modified device displayed a champion PCE of 21.33%. The TDDAB surface treatment not only enhances the PCE but the bulky cation of the TDDAB also forms a hydrophobic capping surface (water contact angle of 93.39°) and safeguards the underlayer perovskite from moisture. As a result, the modified PSC has exhibited almost no performance loss after 30 days in air (RH ≈ 40%).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Surface Capping Layer Prepared from the Bulky Tetradodecylammonium Bromide as an Efficient Perovskite Passivation Layer for High-Performance Perovskite Solar Cells

Abate

Jha

et al. 2022

ACS Appl. Mater. Interfaces

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“…Organic–inorganic hybrid perovskites have emerged as the most promising photovoltaic technologies due to their superior optoelectrical properties, including extended light absorption, long carrier diffusion length, large carrier mobility, low-temperature solution processability, and high defect tolerance. , The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has risen rapidly from the initial 3.8% to 25.5% within a decade. , However, the long-term operating stability of three-dimensional (3D) PSCs under outdoor conditions is still a matter of concern for their potential commercialization. − Recently, 2D perovskite with bulky organic cation in quantum well structure has been proven to show better thermal and moisture stability than their 3D counterpart. , Due to the inclusion of hydrophobic organic cation in the perovskite structure and large formation energy, these 2D perovskites can inhibit ion migration and minimize the defect states. − However, anisotropic charge transport in these 2D perovskites limits their PCE in comparison to 3D perovskite. , Many efforts have been devoted to increasing the PCE of 2D perovskites such as interface engineering, compositional engineering, solvent engineering, etc. , One such approach is to form a thin 2D layer on top of the 3D structure which can provide the dual benefit of higher efficiency from 3D perovskite and improved stability contributed by 2D analogue. , Consequently, 2D/3D heterostructure PSCs have recently received huge research interest with PCE reaching 24.35% for formamidinium lead triiodide based mixed perovskite (FAPbI 3 ) 0.95 (MAPbBr 3 ) 0.05 and stability 98% after 1620 h under full-sun illumination have been received . A wide variety of organic spacers with different structures, for example, butylammonium, n -propylammonium, 1,1,1-trifluoro-ethylammonium, ethylammonium, 2-(4-fluorophenyl)ethylammonium, cyclopropyl ammonium, ammonium valeric acid, phenyl ethylammonium, and penta-fluorophenyl ethylammonium have been utilized to fabricate 2D/3D PSCs and improve the ambient stability. ,,− Most recently, Jeong et al have reported the facile fabrication of 2D/3D perovskite heterojunction by using cyclohexane ammonium iodide (CHAI) on the top of formamidinium lead triiodide (FAPbI 3 ) perovskites . The 2D/3D perovskite heterojunction based on CHAI organic spacer enabled the efficient hole extraction and effectively passivates the anionic iodide vacancies through electrostatic interactions.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Stable 2D Dion Jacobson/3D Perovskite Heterojunction Solar Cells

Yukta

Parikh

Chavan

et al. 2022

ACS Appl. Mater. Interfaces

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Heterostructures involving two-dimensional/three-dimensional (2D/3D) perovskites have recently attracted increased attention due to their ability to combine the high photovoltaic performance of 3D perovskites with the increased stability of 2D perovskites. Here we report ammonium thiocyanate (NH4SCN) passivated 3D methylammonium lead triiodide (MAPbI3) perovskite active layer and deposition of 2D perovskite capping layer using xylylene diammonium iodide (XDAI) organic cation. The 2D/3D perovskite heterojunction formation is probed by using FESEM and UPS spectroscopy. The NH4SCN passivated MAPbI3 perovskite has shown 19.6% PCE compared to the 17.18% PCE of pristine MAPbI3 perovskite solar cells (PSCs). Finally, the champion 2D/3D perovskite heterojunction based solar cells have achieved the remarkable PCE of 20.74%. The increased PCE in 2D/3D PSCs is mainly attributed to the reduced defect density and suppressed nonradiative recombination losses. Moreover, the hydrophobic 2D capping layer endows the 2D/3D heterojunction perovskites with exceptional moisture, thermal and UV stability, highlighting the promise of highly stable and efficient 2D/3D PSCs.

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“…Piezoelectric materials, including crystals [1], polymer [2], bi-molecules [3] and 2D materials [4], play a critical role in electromechanical and mechanoelectrical device technology, such as sensors and actuators [5][6][7][8][9][10]. Alongside with solid-state energy conversion strategies, such as solar cell [11], thermoelectricity [12] and triboelectricity [13], piezoelectricity represents another promising contender for salvaging electrical energy from mechanical motion [14]. Materials with simultaneous presence of excellent piezoelectric, electrical, mechanical and optical properties are particularly much sought-after due to their enormous technological usefulness for developing multifunctional devices that synergize piezoelectricity with other functionalities.…”

Section: Introductionmentioning

confidence: 99%

2D Janus Niobium Oxydihalide NbO$XY$: Multifunctional High-Mobility Piezoelectric Semiconductor for Electronics, Photonics and Sustainable Energy Applications

Su¹,

Lee²,

Guo³

et al. 2022

Preprint

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Two-dimensional (2D) niobium oxydihalide NbOI2 has been recently demonstrated as an excellent in-plane piezoelectric and nonlinear optical material. Here we show that Janus niobium oxydihalide, NbOXY (X, Y = Cl, Br, I and X =Y), is a multifunctional anisotropic semiconductor family with exceptional piezoelectric, electronic, photocatalytic and optical properties. NbOXY are stable and flexible monolayers with band gap around the visible light regime of ∼ 1.9 eV. The anisotropic carrier mobility of NbOXY lies in the range of 10 3 ∼ 10 4 cm 2 V −1 s −1 , which represents some of the highest among 2D semiconductors of bandgap 2 eV. Inversion symmetry breaking in Janus NbOXY generates sizable out-of-plane d31 piezoelectric response while still retaining a strong in-plane piezoelectricity. Remarkably, NbOXY exhibits an additional out-of-plane piezoelectric response, d32 as large as 0.55 pm/V. G0W0-BSE calculation further reveals the strong linear optical dichroism of NbOXY in the visible-to-ultraviolet regime. The optical absorption peaks of 14 ∼ 18 % in the deep UV regime (5 ∼ 6 eV) outperform the vast majority of other 2D materials. The high carrier mobility, strong optical absorption, sizable built-in electric field and band alignment compatible with overall water splitting further suggest the strengths of NbOXY in solar-to-hydrogen conversion. We further propose a directional stress sensing device to demonstrate how the outof-plane piezoelectricity can be harnessed for functional device applications. Our findings unveil NbOXY as an exceptional multifunctional 2D semiconductor for flexible electronics, optoelectronics, UV photonics, piezoelectronics and sustainable energy applications.

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Multifunctional 2D perovskite capping layer using cyclohexylmethylammonium bromide for highly efficient and stable perovskite solar cells

Cited by 16 publications

References 61 publications

Surface Capping Layer Prepared from the Bulky Tetradodecylammonium Bromide as an Efficient Perovskite Passivation Layer for High-Performance Perovskite Solar Cells

Surface Capping Layer Prepared from the Bulky Tetradodecylammonium Bromide as an Efficient Perovskite Passivation Layer for High-Performance Perovskite Solar Cells

Highly Efficient and Stable 2D Dion Jacobson/3D Perovskite Heterojunction Solar Cells

2D Janus Niobium Oxydihalide NbO$XY$: Multifunctional High-Mobility Piezoelectric Semiconductor for Electronics, Photonics and Sustainable Energy Applications

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