Naphtho[1,2-<i>b</i>:4,3-<i>b</i>′]dithiophene-based hole transporting materials for high-performance perovskite solar cells: molecular engineering and opto-electronic properties

Cui, Binbin; Yang, Ning; Shi, Congbo; Yang, Shuangshuang; Shao, Jiang‐Yang; Han, Ying; Zhang, Liuzhu; Zhang, Qingshan; Zhong, Yu‐Wu; Chen, Qi

doi:10.1039/c8ta02071j

Cited by 41 publications

(26 citation statements)

References 49 publications

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“…10. A naphtho[1,2- b :4,3- b ′]dithiophene-based HTM, NDT , has been reported by Cui and co-workers and showed a PCE of 18.8% 130. Another similar example employing the dithieno[3,2- b :2′,3′- d ]pyrrole derivative H16 was reported to achieve a PCE over 18% 131.…”

Section: Introductionmentioning

confidence: 83%

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

2019

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Section: Introductionmentioning

confidence: 83%

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

2019

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“…This adverse impact may limit the maximized promotion of the device performance. Moreover, large‐size aniline/alkyl‐amine molecules could anchor to the surface and grains/units of the perovskite films with certain orientation on account of the stronger steric hindrance and rigidity features . However, the structure order characteristic of the molecular effect on the interfacial polarity of the perovskite/transporting layers is rarely discussed.…”

Section: Introductionmentioning

confidence: 99%

Conjugated Molecules “Bridge”: Functional Ligand toward Highly Efficient and Long‐Term Stable Perovskite Solar Cell

Dong

Zuo

et al. 2019

Adv Funct Materials

110

107

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Interfacial ligand passivation engineering has recently been recognized as a promising avenue, contributing simultaneously to the optoelectronic characteristics and moisture/operation tolerance of perovskite solar cells. To further achieve a win-win situation of both performance and stability, an innovative conjugated aniline modifier (3-phenyl-2-propen-1-amine; PPEA) is explored to moderately tailor organolead halide perovskites films. Here, the conjugated PPEA presents both "quasi-coplanar" rigid geometrical configuration and distinct electron delocalization characteristics. After a moderate treatment, a stronger dipole capping layer can be formed at the perovskite/ transporting interface to achieve favorable banding alignment, thus enlarging the built-in potential and promoting charge extraction. Meanwhile, a conjugated cation coordinated to the surface of the perovskite grains/units can form preferably ordered overlapping, not only passivating the surface defects but also providing a fast path for charge exchange. Benefiting from this, a ≈21% efficiency of the PPEA-modified solar cell can be obtained, accompanied by long-term stability (maintaining 90.2% of initial power conversion efficiency after 1000 h testing, 25 °C, and 40 ± 10 humidity). This innovative conjugated molecule "bridge" can also perform on a larger scale, with a performance of 18.43% at an area of 1.96 cm 2 .

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“…As burgeoning materials for optoelectronic and photonic devices, metal-halide perovskites have attracted much attention for their changeable crystal structures, tunable semiconductor properties and quantum confinement effect in low-dimensionality recently 1,2 . Latest discovered zero-dimensional (0D), one-dimensional (1D) and two-dimensional (2D) halide perovskites are promising phosphors for efficient illumination 3,4 , wherein the quantum confinement effect at molecular levels, together with exciton self-trappings states, lead to excellent photoluminescence (PL) and unique applications potentially.…”

Section: Introductionmentioning

confidence: 99%

Locally collective hydrogen bonding isolates lead octahedra for white emission improvement

et al. 2019

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As one of next-generation semiconductors, hybrid halide perovskites with tailorable optoelectronic properties are promising for photovoltaics, lighting, and displaying. This tunability lies on variable crystal structures, wherein the spatial arrangement of halide octahedra is essential to determine the assembly behavior and materials properties. Herein, we report to manipulate their assembling behavior and crystal dimensionality by locally collective hydrogen bonding effects. Specifically, a unique urea-amide cation is employed to form corrugated 1D crystals by interacting with bromide atoms in lead octahedra via multiple hydrogen bonds. Further tuning the stoichiometry, cations are bonded with water molecules to create a larger spacer that isolates individual lead bromide octahedra. It leads to zero-dimension (0D) single crystals, which exhibit broadband ‘warm’ white emission with photoluminescence quantum efficiency 5 times higher than 1D counterpart. This work suggests a feasible strategy to modulate the connectivity of octahedra and consequent crystal dimensionality for the enhancement of their optoelectronic properties.

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Naphtho[1,2-b:4,3-b′]dithiophene-based hole transporting materials for high-performance perovskite solar cells: molecular engineering and opto-electronic properties

Abstract: Better planarity and conjugation of hole-transporting materials resulting in good charge extraction and transport efficiently improve the performance of perovskite solar cells.

Cited by 41 publications

References 49 publications

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

Efficiencyvs.stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

Conjugated Molecules “Bridge”: Functional Ligand toward Highly Efficient and Long‐Term Stable Perovskite Solar Cell

Locally collective hydrogen bonding isolates lead octahedra for white emission improvement

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