Graphdiyne as a Host Active Material for Perovskite Solar Cell Application

Li, Jiang-Sheng; Jiu, Tonggang; Siqi, Chen; Liu, Le; Yao, Quantong; Bi, Fuzhen; Zhao, Chengjie; Wang, Zhen; Zhao, Min; Zhang, Guodong; Xue, Yurui; Lu, Fushen; Li, Yuliang

doi:10.1021/acs.nanolett.8b02863

Cited by 125 publications

(72 citation statements)

References 29 publications

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“…The key cell parameters of V oc , J sc , FF, and PCE are summarized in Table S1 (Supporting Information). [35] The better crystal quality can effectively increase the charge collection and transport in the perovskite film, while the fewer and more optimized grain boundaries also reduce the defects in the film, which is also consistent with the results of other research. The increase in J sc is mainly due to the improvement of light absorption within the perovskite film ( Figure S4, Supporting Information), which is caused by the improvement of film thickness after adding oxo-G/DA.…”

Section: Characterization Of Perovskite:oxo-g/da Filmssupporting

confidence: 90%

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Zuo

Qiong

et al. 2019

Advanced Energy Materials

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Recent progress of PSCs in efficiency and stability enhancement is addressed to the change of perovskite composition and crystal optimization. By introducing mixed cations and halide to adjust the composition of the organicinorganic hybrid perovskite, the crystal structure of the perovskite can be effectively improved, which ultimately led to the increased stability and efficiency of the PSCs. Compared with the single cation/ halide perovskite (methylammonium halide, formamidinium lead halide, and cesium lead halide), the mixed perovskite not only has higher PCE but also has better heat and humid air stability. [9][10][11][12] For mixed cation/halide perovskites, despite good optoelectronic properties, the mixing of multiple cations and halogens is prone to localized ionic enrichment during preparation, annealing, and operation. At the same time, as the cation and halide ions move in the builtin electric field of the device, local positive and negative ion vacancies are formed. These defects will cause significant hysteresis in the device and ultimately affect the performance of the device. [13][14][15][16][17] A series of studies on both experimental and theoretical methods [13,18,19] have been reported. Constraining Mixed cation/halide perovskites have led to a significant increase in the efficiency and stability of perovskite solar cells. However, mobile ionic defects inevitably exacerbate the photoinduced phase segregation and selfdecomposition of the crystal structure. Herein, ultrathin 2D nanosheets of oxo-functionalized graphene/dodecylamine (oxo-G/DA) are used to solve ion migration in cesium (Cs)-formamidinium (FA)-methylammonium (MA) triple-cation-based perovskites. Based on the superconducting carbon skeleton and functional groups that provide lone pairs of electrons on it, the ultrathin 2D network structure can fit tightly on the crystals and wrap them, isolating them, and thus reducing the migration of ions within the built-in electric field of the perovskite film. As evidence of the formation of sharp crystals with different orientation within the perovskite film, moiré fringes are observed in transmission electron microscopy. Thus, a champion device with a power conversion efficiency (PCE) of 21.1% (the efficiency distribution is 18.8 ± 1.7%) and a remarkable fill factor of 81%, with reduced hysteresis and improved long-term stability, is reported. This work provides a simple method for the improvement of the structural stability of perovskite in solar cells.

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Section: Characterization Of Perovskite:oxo-g/da Filmssupporting

confidence: 90%

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Zuo

Qiong

et al. 2019

Advanced Energy Materials

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“…Moreover, compared with the sp 2 -hybridized carbon of graphene, the high-energy sp-hybridized states endow GDY with more versatility and flexibility [43]. Taking the merits of inherent characteristics, the GDY nanostructures hold huge promises in various fields such as catalysis [44][45][46][47], solar cells [48][49][50], supercapacitors and batteries [51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Probing the active sites of site-specific nitrogen doping in metal-free graphdiyne for electrochemical oxygen reduction reactions

et al. 2020

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“…In 2010, Li et al first prepared graphdiyne (GDY) by in situ cross‐coupling method, [ 22 ] which aroused great interest of chemists, physicists, material scientists and other researchers. Afterward, GDY was extensively applied to various fields, including rechargeable battery, [ 23,24 ] catalysis, [ 25 ] solar cell, [ 26 ] biomedicine, [ 27 ] gas separation, [ 28 ] and water remediation. [ 29 ] Very recently, GDY has been widely employed as a support for electrocatalysts to enhance energy conversion efficiency, including hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), overall water splitting (OWS), and nitrogen reduction reaction (NRR).…”

Section: Introductionmentioning

confidence: 99%

Graphdiyne: A Rising Star of Electrocatalyst Support for Energy Conversion

Lai

Zhang

et al. 2020

Advanced Energy Materials

119

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Graphdiyne (GDY), a rising star of 2D carbon allotropes with one‐atom‐thick planar layers, has achieved the coexistence of sp‐ and sp2‐hybridized carbon atoms in a 2D planar structure. In contrast to the prevailing carbon allotropes, GDY possesses Dirac cone structures, which endow it with unique chemical and physical properties, including an adjustable inherent bandgap, high‐speed charge carrier transfer efficiency, and excellent conductivity. Additionally, GDY also displays great potential in photocatalysis, rechargeable batteries, solar cells, detectors, and especially electrocatalysis. In this work, various GDY‐supported electrocatalysts are described and the reasons why GDY can act as a novel support are analyzed from the perspective of molecular structure, electronic properties, mechanical properties, and stability. The various electrochemical applications of GDY‐supported electrocatalysts in energy conversion such as hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, overall water splitting, and nitrogen reduction reaction are reviewed. The challenges facing GDY and GDY‐based materials in future research are also outlined. This review aims at providing an in‐depth understanding of GDY and promoting the development and application of this novel carbon material.

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Graphdiyne as a Host Active Material for Perovskite Solar Cell Application

Cited by 125 publications

References 29 publications

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Probing the active sites of site-specific nitrogen doping in metal-free graphdiyne for electrochemical oxygen reduction reactions

Graphdiyne: A Rising Star of Electrocatalyst Support for Energy Conversion

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