Auto-passivation of crystal defects in hybrid imidazolium/methylammonium lead iodide films by fumigation with methylamine affords high efficiency perovskite solar cells

Zhang, Yi; Grancini, Giulia; Fei, Zhaofu; Shirzadi, Erfan; Li, Xuehui; Oveisi, Emad; Fadaei‐Tirani, Farzaneh; Scopelliti, Rosario; Feng, Yaqing; Nazeeruddin, Mohammad Khaja; Dyson, Paul J.

doi:10.1016/j.nanoen.2019.01.027

Cited by 77 publications

(67 citation statements)

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“…Bi et al reported FEAI additive in MAPbI 3 with the possible formation of 1D FEAPbI 3 perovskite that enhanced the overall perovskite morphology and stability of the perovskite devices . Imidazolium iodide was also shown as an effective additive in a perovskite precursor to boost PSC performance via defect passivation . Fumigation with MA results in the deprotonation of the embedded imidazolium cations, generating imidazole and MA + , resulting in the formation of 1D IMPbI 3 and passivation of crystal defects.…”

Section: Progress On Additive Engineering During Perovskite Formationmentioning

confidence: 99%

Additive Engineering for Efficient and Stable Perovskite Solar Cells

Wang

Zhu

2019

Advanced Energy Materials

559

451

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Perovskite solar cells (PSCs) have reached a certified 25.2% efficiency in 2019 due to their high absorption coefficient, high carrier mobility, long diffusion length, and tunable direct bandgap. However, due to the nature of solution processing and rapid crystal growth of perovskite thin films, a variety of defects can form as a result of the precursor compositions and processing conditions. The use of additives can affect perovskite crystallization and film formation, defect passivation in the bulk and/or at the surface, as well as influence the interface tuning of structure and energetics. Here, recent progress in additive engineering during perovskite film formation is discussed according to the following common categories: Lewis acid (e.g., metal cations, fullerene derivatives), Lewis base based on the donor type (e.g., O‐donor, S‐donor, and N‐donor), ammonium salts, low‐dimensional perovskites, and ionic liquid. Various additive‐assisted strategies for interface optimization are then summarized; additives include modifiers to improve electron‐ and hole‐transport layers as well as those to modify perovskite surface properties. Finally, an outlook is provided on research trends with respect to additive engineering in PSC development.

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Section: Progress On Additive Engineering During Perovskite Formationmentioning

confidence: 99%

Additive Engineering for Efficient and Stable Perovskite Solar Cells

Wang

Zhu

2019

Advanced Energy Materials

559

451

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“…Moreover, 1D perovskite structures can also be formed by other organic molecules, including ethylammonium iodide (EAI), [ 40 ] 1,1,1 ‐trifluoro‐ethyl ammonium iodide (FEAI) [ 116 ] and imidazolium iodide (IAI). [ 117 ] Alharbi et al applied solid‐state nuclear magnetic resonance (NMR) to confirm that EAI, IAI, and guanidinium iodide (GuaI) formed a 1D passivation layer on the perovskite grains in Figure 3g, which inhibited the interfacial nonradiative recombination through the formation of 3D/1D heterostructure with high ambient stability and passivation of iodide vacancies. [ 40 ] Therefore, LD perovskite layer can not only significantly enhance humidity resistance, but also reduce the hysteresis by impeding the ion diffusion.…”

Section: Various Types Of Defectsmentioning

confidence: 99%

Toward Efficient and Stable Perovskite Solar Cells: Choosing Appropriate Passivator to Specific Defects

Zhou

et al. 2020

Solar RRL

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Figure 3. The impact of MABr treatment on the scanning electron microscopy (SEM) images of film morphology (MAPbI 3 films a) without and b) with MABr treatment), c) ultraviolet-visible (UV-vis) absorption spectra, and d) XRD patterns of the perovskite films. Reproduced with permission. [61] Copyright 2016, Springer Nature. e) Schematic illustration and f) SEM images of the molecule-passivated RP/3D heterostructure. Reproduced with permission. [115] Copyright 2018, Royal Society of Chemistry. g) Schematic representation of the 1D/3D heterostructure evidenced by solid-state NMR proximity measurements. Reproduced with permission. [40] Copyright 2019, Springer Nature. h) Secondary-ion mass spectrometry (SIMS) measurement of interdiffusion-grown MAPbI 3 films on indium tin oxide (ITO) glass. Reproduced with permission.

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“…Organic/inorganic hybrid perovskite solar cells (PSCs) are emerging next-generation photovoltaic technologies that have attracted attention for their dramatic improvements in efficiency-from 3.8% [1] to over 24%-in less than a decade [2], their low manufacturing costs, and their ease of solution processing. To promote the device performance of PSCs beyond 20%, several techniques have been investigated, including variations in composition [3][4][5], control over the perovskite film growth [6][7][8][9], interface engineering [10][11][12], the use of additives [13][14][15], ionic liquid technique [16], and surface passivation [17][18][19]. Among the perovskite materials currently being investigated, the low-band-gap α-phase formamidinium lead iodide (FAPbI 3 ) perovskite, which possesses an ideal band gap of 1.48 eV and extended light absorption to 840 nm [20][21][22], appears to have the most promising perovskite composition to achieve record-breaking photocurrent densities and power conversion efficiencies (PCEs) [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%