2022
DOI: 10.1021/acsami.2c09926
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Heterojunction In Situ Constructed by a Novel Amino Acid-Based Organic Spacer for Efficient and Stable Perovskite Solar Cells

Abstract: The optical properties and stability of metal halide perovskites can be improved by reducing their dimensionality. Because defects at the perovskite film grain body and boundaries cause significant energetic losses by nonradiative recombination, perovskite films with manageable crystal size and macroscopic grains are essential to improve the photovoltaic properties. Through theoretical calculation models and experiments, we show that the carboxyl group of 4-ammonium butyric acid-based cation (4-ABA+) can inter… Show more

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Cited by 12 publications
(14 citation statements)
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“…We focus on five different classes of organic cations: NBT 2 PbI 4 [NBT = n -butylammonium], , MTEA 2 PbI 4 [MTEA = 2-(methylthio-)­ethylammonium], , PEA 2 PbI 4 [PEA = phenylethylammonium], , I-PMA 2 PbI 4 [4-iodophenylmethylammonium], , and ABA 2 PbI 4 [ABA = 4-aminobutyric acid] , (see Figure a,b). The organic cations were chosen to explore different intermolecular interactions in the final 2D perovskites, while exploiting the same ammonium groups for binding the inorganic scaffold.…”
mentioning
confidence: 99%
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“…We focus on five different classes of organic cations: NBT 2 PbI 4 [NBT = n -butylammonium], , MTEA 2 PbI 4 [MTEA = 2-(methylthio-)­ethylammonium], , PEA 2 PbI 4 [PEA = phenylethylammonium], , I-PMA 2 PbI 4 [4-iodophenylmethylammonium], , and ABA 2 PbI 4 [ABA = 4-aminobutyric acid] , (see Figure a,b). The organic cations were chosen to explore different intermolecular interactions in the final 2D perovskites, while exploiting the same ammonium groups for binding the inorganic scaffold.…”
mentioning
confidence: 99%
“…We focus on five different classes of organic cations: NBT 2 PbI 4 [NBT = n-butylammonium], 24,25 30,31 (see Figure 1a,b). The organic cations were chosen to explore different intermolecular interactions in the final 2D perovskites, while exploiting the same ammonium groups for binding the inorganic scaffold.…”
mentioning
confidence: 99%
“…[8] Moreover, amino acids, with amino, carboxyl, and other functional groups in one molecule, are proposed as an effective multisite passivator. [9][10][11][12][13] For instance, Kwanghee Lee et al achieved simultaneous passivation of cationic and anionic defects inside MAPbI 3 with both positive (NH 3 þ ) and negative (COO À ) functional groups through introducing L-alanine into the precursor solution as an additive. As a result, the power conversion efficiencies (PCEs) were enhanced from 18.3 to 20.3% for small-area (4.64 mm 2 ) and from 13.5 to 15.6% for large-area submodules (9.06 cm 2 ).…”
Section: Introductionmentioning
confidence: 99%
“…[ 8 ] Moreover, amino acids, with amino, carboxyl, and other functional groups in one molecule, are proposed as an effective multisite passivator. [ 9–13 ]…”
Section: Introductionmentioning
confidence: 99%
“…[16,17] SnO 2 , a wonderful electron transport layer for perovskite photovoltaics, is currently considered the most desirable material for the electron transporting layer due to its high charge mobility and energy level matching with perovskite. [18,19] Until now, the solution process, including the precursor spin-coating [2,9,20] and chemical bath deposition (CBD) method, [21,22] has been wildly used to prepare SnO 2 film. CBD usually takes a long time to prepare films and requires precise control of the synthesis conditions.…”
Section: Introductionmentioning
confidence: 99%