Strategic Synthesis of Ultrasmall NiCo<sub>2</sub>O<sub>4</sub> NPs as Hole Transport Layer for Highly Efficient Perovskite Solar Cells

Ouyang, Dan; Xiao, Junyan; Ye, Fei; Huang, Zhanfeng; Zhang, Hong; Zhu, Lu; Cheng, Jiaqi; Choy, Wallace C. H.

doi:10.1002/aenm.201702722

Cited by 125 publications

(90 citation statements)

References 60 publications

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“…1- 6 The quality of perovskites can be improved by solvent annealing, thermal treatment, 7,8 or using additives [9][10][11] to alter the morphology of the perovskites. In recent reports, the PCEs can reach a maximum of 22.7%.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature, simple and efficient preparation of perovskite solar cells using Lewis bases urea and thiourea as additives: stimulating large grain growth and providing a PCE up to 18.8%

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Low-temperature, simple and efficient preparation of perovskite solar cells using Lewis bases urea and thiourea as additives: stimulating large grain growth and providing a PCE up to 18.8%

et al. 2018

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“…Recently Besides, Choy and co-workers also adopt coprecipitation method to prepare p-type ternary nickel cobalt oxide (NiCo 2 O 4 ). [65] By wisely choosing ammonium hydroxide as mineralizer, ultrasmall and well-dispersed ternary oxide particles are obtained by controlling the deamination process. In coprecipitation approach, a hydroxide intermediate is typically obtained from solution with control acidity and this hydroxide intermediate is always directly converted into metal oxide nanoparticles by high-temperature calcination.…”

Section: Coprecipitation and Other Approachmentioning

confidence: 99%

Solution‐Processed Ternary Oxides as Carrier Transport/Injection Layers in Optoelectronics

Huang

Ouyang

Shih

et al. 2019

Advanced Energy Materials

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With the remarkable progress in solution‐processed optoelectronics, high performance is required of the carrier transport/injection layer. Ternary oxides containing a variety of crystal structures, and adjustable composition that results in tunable optical and electrical properties, are one of the promising class of candidates to fulfill the requirements of carrier transport/injection layers for high‐performance and stable optoelectronic devices. Solution‐processed ternary oxides have seen considerable progress in recent decades, due to their advantages in the quest to design low‐cost, high‐performance, large‐scale, and stable optoelectronic devices. Herein, the recent advances of solution‐processed ternary oxides are reviewed. The first section consists of a brief introduction to the topic. In the following section, the fundamentals of the effect of tuning ternary oxide composition are summarized. Section three briefly reviews the synthesis approaches for preparing ternary oxides. Section four discusses the recent progress of solution‐processed ternary oxide as carrier transport/injection layer in optoelectronic devices (such as organic solar cells, perovskite solar cells, organic light emitting diodes, etc.). In this section, the impact of controlling ternary oxide composition on device performance and stability is highlighted. Finally, a brief summary and an outlook are given.

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“…The crystallization and film morphology of perovskite will be significantly affected by the underlying CTL, which considerably affect the film quality and highly relate to the PVSC performance . The CTL properties, e.g., work function, mobility, morphology, and defect, are of critical importance for high‐performance PVSCs.…”

Section: Carrier Transporting Layers In Perovskite Solar Cellsmentioning

confidence: 99%

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

Ren

Wang

Choy

2019

Advanced Optical Materials

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strategies for efficiency improvement. [3,4] Currently, it is found that the film quality of the perovskites synthesized by the newly developed approaches is capable of producing an absorption layer delivering the PCE of over 20%. The engineering of the interfacial properties has become a critical issue for the material scientists, engineers, and physicists. The further improvement of PCE requires multidisciplinary collaborative investigations. There are recent reports on the modifications of the commonly used carrier transport materials including the organic materials, inorganic materials, nanocomposites, etc. For the organic materials, 2,2′,7,7′-tetrakis(N,Nd i -p -m e t h o x y p h e n y l -a m i n e ) 9 , 9 ′spirobifluorene (Spiro-OMeTAD), poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), and poly (triarylamine) (PTAA) are typically used to transport holes. [5][6][7][8][9][10][11][12][13][14][15][16][17] The fullerene based materials and their derivatives are also intensively studied as electron transport materials, such as the phenyl-C 61 -butyric acid methyl ester (PCBM), C 60 bathocuprione (BCP), etc. Meanwhile, the relatively low-cost nonfullerenes, e.g., 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′] dithiophene) (ITIC) and their derivatives that possess excellent optical and electrical properties compared with their fullerene counterparts are also promising for highly efficient and stable PVSCs. [18][19][20][21][22][23][24][25][26][27][28][29] Regarding the inorganic semiconductor materials, metal oxides possess superior stability and tunable optical and electrical properties compared with the organic semiconductor materials. The various metal oxides such as titanium dioxide (TiO 2 ), [13,[30][31][32][33][34][35][36][37][38] zinc oxide (ZnO), [39,40,38,19,41] and tin oxide (SnO 2 ) [42][43][44][45][46][47][48][49] are commonly used as the electron transport layer (ETL), while nickel oxide (NiO x ), [50][51][52][53] copper oxide (Cu 2 O), [54,55] copper (I) thiocyanate (CuSCN), [16,56,57] copper gallium oxide (CuGaO 2 ), [58] and nickel cobalt oxide (NiCoO x ) [12,59] serve as the hole transport layer (HTL) in the PVSCs. [60,61] Meanwhile, several theoretical studies based on different approaches to the device models have also been reported, focusing on the underlying physics of the efficiency loss, [62] hysteresis phenomena, [63][64][65][66] etc., which are substantially affected by the carrier transport layer (CTL) properties. These models enable the analysis of the device performance from the macroscopic circuit aspect [67] to the microscopic carrier level, [65] which offer a comprehensive understanding of the device physics of CTLs in PVSCs.Perovskite solar cells (PVSCs) have emerged as a promising candidate for addressing the energy crisis due to their rapid efficiency improvement up to 24.2% within 10 years. The defects existing in perovskite film have been found to be as low as 10 15 cm ...

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Strategic Synthesis of Ultrasmall NiCo₂O₄ NPs as Hole Transport Layer for Highly Efficient Perovskite Solar Cells

Cited by 125 publications

References 60 publications

Low-temperature, simple and efficient preparation of perovskite solar cells using Lewis bases urea and thiourea as additives: stimulating large grain growth and providing a PCE up to 18.8%

Low-temperature, simple and efficient preparation of perovskite solar cells using Lewis bases urea and thiourea as additives: stimulating large grain growth and providing a PCE up to 18.8%

Solution‐Processed Ternary Oxides as Carrier Transport/Injection Layers in Optoelectronics

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

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Strategic Synthesis of Ultrasmall NiCo2O4 NPs as Hole Transport Layer for Highly Efficient Perovskite Solar Cells

Cited by 125 publications

References 60 publications

Low-temperature, simple and efficient preparation of perovskite solar cells using Lewis bases urea and thiourea as additives: stimulating large grain growth and providing a PCE up to 18.8%

Low-temperature, simple and efficient preparation of perovskite solar cells using Lewis bases urea and thiourea as additives: stimulating large grain growth and providing a PCE up to 18.8%

Solution‐Processed Ternary Oxides as Carrier Transport/Injection Layers in Optoelectronics

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

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Strategic Synthesis of Ultrasmall NiCo₂O₄ NPs as Hole Transport Layer for Highly Efficient Perovskite Solar Cells