In situ fabrication of 2D SnS2 nanosheets as a new electron transport layer for perovskite solar cells

Zhao, Erling; Gao, Liguo; Yang, Shaopeng; Wang, Likun; Cao, Junjie; Ma, Tingli

doi:10.1007/s12274-018-2103-z

Cited by 74 publications

(54 citation statements)

References 49 publications

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“…SnS 2 exhibits a high optical absorption coefficient and strong photoconductive properties in visible regions and this has given rise to increased interest due to its particular structure, suitable band gap (~2.2 eV), good chemical stability, low-cost and environmental friendliness [25]. Therefore, it has been widely used in many fields, such as lithium (sodium) ion batteries [26,27], solar cells [28,29], photocatalysis [30,31], field effect transistors [32,33], photodetectors [34,35,36], etc. Su et al [37] used chemical vapor deposition (CVD) to introduce metal seeds on the substrate to achieve high-quality SnS 2 thin film for location-selective synthesis, and the response time and quantum efficiency of the fabricated photodetector was ~5 microseconds and 11.3%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Hybrid Composites of SnS2 Nanosheets Array Film with Graphene for Enhanced Photoelectric Performance

Fang

Yao

et al. 2019

Nanomaterials

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Two-dimensional (2D) metal dichalcogenides have attracted considerable attention for use in photoelectric devices due to their unique layer structure and strong light-matter interaction. In this paper, vertically grown SnS2 nanosheets array film was synthesized by a facile chemical bath deposition (CBD). The effects of deposition time and annealing temperature on the quality of SnS2 films was investigated in detail. By optimizing the preparation conditions, the SnS2 array film exhibited efficient photoelectric detection performance under sunlight. Furthermore, in order to improve the performance of the photodetector based on SnS2 nanosheets film, a transparent graphene film was introduced as the hole-transport layer by wet-chemical method directly transferring techniques. Graphene/SnS2 nanosheets array film heterojunction photodetectors exhibit enhanced photoresponsivity. The light on/off ratio of the photodetector based on graphene/SnS2 was 1.53, about 1.4 times higher than that of the pristine SnS2 array films. The improved photoresponse performance suggested that the effective heterojunction between vertical SnS2 nanosheets array film and graphene suppresses the recombination of photogenerated carriers. The results indicate that the graphene/SnS2 heterojunction photodetectors have great potential in photodetection devices.

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Section: Introductionmentioning

confidence: 99%

Two-Dimensional Hybrid Composites of SnS2 Nanosheets Array Film with Graphene for Enhanced Photoelectric Performance

Fang

Yao

et al. 2019

Nanomaterials

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“…Ma et al fabricated SnS 2 nanosheet arrays as ETL by a low temperature hydrothermal method. 67 The proper homogeneously grown SnS 2 nanosheet arrays contributed to more effective electron collection and the perovskite particles embedding, and was confirmed by scanning electron microscopy (SEM) images and PL measurements. Finally, the optimal device achieved a champion PCE of 13.63% with a high J sc of 23.70 mA cm −2 .…”

Section: D Ordered Array Structured Etlmentioning

confidence: 75%

Ordered array structures for efficient perovskite solar cells

Cao

Wang

Sun

et al. 2020

Engineering Reports

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In the past few years, metal halide perovskite solar cells (PSCs) have attracted widespread attention in the photovoltaic field, and their power conversion efficiency has rapidly exceeded 25%. Among the adopted effective strategies to realize the high efficiency, the introduction and utilization of ordered array structure in the PSCs are particularly prominent, which can simultaneously enhance light harvesting efficiency and carrier transport properties by manipulating the light paths (reflection, scattering, extraction, and propagation) and constructing direct charge transport paths. The full utilization of sunlight contributes to high short-circuit current density (J sc), and strong carriers transport is favorable for high charge collection and reducing charge recombination. Moreover, for flexible PSCs, ordered array structured device can be greatly relaxed during bending, thereby suppressing the formation of cracks in PSCs. Herein, this article focuses on the ordered array structure design, reviews the recent research progress of the ordered array structures in PSCs, and provides some promising perspectives for further improvement.

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“…Meanwhile, the molecular precursors compounds such as tin or organotin dithiocarbamates have received tremendous attention in their potential applications in non-linear optical materials, biology, industry, agriculture, chemistry and some have been found to be pharmacologically active (Muthalib et al 2011;Awang et al 2016). Apart from the singlesource molecular precursor (SSMP) method our research group has previously reported (Mbese and Ajibade 2017;Mbese and Ajibade 2018), researchers have synthesized SnS nanocrystals using dual source precursors methods such as thermal evaporation (Shao et al 2017;Kawano et al 2015), spray pyrolysis (Sall et al 2016;Akbari and Rozati 2015), electrodeposition (Kafashan et al 2017;Ichimura et al 2000), radiofrequency (RF) sputtering (Banai et al 2016;Seol et al 2003), sonochemical method (Park et al 2014;Henry et al 2015), electron beam (EB) evaporation (Zhao et al 2018) and chemical bath deposition (Al-Shakban et al 2019;Kevin et al 2015a, b). The advantage of using SSMP is that, precursor complexes are stoichiometric synthesized to contain the desired elements so that precursor complexes thermally decompose to yield materials of specific compositions.…”

Section: Introductionmentioning

confidence: 99%

Optical and structural-chemistry of SnS nanocrystals prepared by thermal decomposition of bis(N-di-isopropyl-N-octyl dithiocarbamato)tin(II) complex for promising materials in solar cell applications

et al. 2020

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Mixed ligand precursor complex bis(N-di-isopropyl-N-octyl dithiocarbamato)tin(II) complex was synthesized from its respective dithiocarbamate ligands, characterized and thermalized through thermogravimetric analysis to yield tin sulfide (SnS) nanocrystals. The thermal decomposition pattern was recorded as a function of the required temperature for the formation of the SnS nanocrystals at 360 °C. The SnS nanocrystals were characterized using optical, vibrational, structural and morphological analyses instruments. The obtained orthorhombic phase SnS nanocrystals showed indirect and direct optical energy band gaps close to the 1.5 eV of the bulk SnS.

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In situ fabrication of 2D SnS2 nanosheets as a new electron transport layer for perovskite solar cells

Cited by 74 publications

References 49 publications

Two-Dimensional Hybrid Composites of SnS2 Nanosheets Array Film with Graphene for Enhanced Photoelectric Performance

Two-Dimensional Hybrid Composites of SnS2 Nanosheets Array Film with Graphene for Enhanced Photoelectric Performance

Ordered array structures for efficient perovskite solar cells

Optical and structural-chemistry of SnS nanocrystals prepared by thermal decomposition of bis(N-di-isopropyl-N-octyl dithiocarbamato)tin(II) complex for promising materials in solar cell applications

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