Copper-copper iodide hybrid nanostructure as hole transport material for efficient and stable inverted perovskite solar cells

Wu, Binghui; Peng, Jian; Feng, Xiaoxia; Li, Congping; Tang, Yu

doi:10.1007/s11426-018-9386-5

Cited by 42 publications

(25 citation statements)

References 48 publications

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“…reported high‐performance inverted perovskite solar cells with a maximum PCE of 18.8%. [ 161 ] The synergistic effect was achieved by the outer CuI layer accelerating the charge extraction and the inner layer facilitated rapid charge transfer toward the cathode.…”

Section: Cui Applications In Thermo/optoelectronic Devicesmentioning

confidence: 99%

Engineering Copper Iodide (CuI) for Multifunctional p‐Type Transparent Semiconductors and Conductors

et al. 2021

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Developing transparent p-type semiconductors and conductors has attracted significant interest in both academia and industry because metal oxides only show efficient n-type characteristics at room temperature. Among the different candidates, copper iodide (CuI) is one of the most promising p-type materials because of its widely adjustable conductivity from transparent electrodes to semiconducting layers in transistors. CuI can form thin films with high transparency in the visible light region using various low-temperature deposition techniques. This progress report aims to provide a basic understanding of CuI-based materials and recent progress in the development of various devices. The first section provides a brief introduction to CuI with respect to electronic structure, defect states, charge transport physics, and overviews the CuI film deposition methods. The material design concepts through doping/alloying approaches to adjust the optoelectrical properties are also discussed in the first section. The following section presents recent advances in state-of-the-art CuI-based devices, including transparent electrodes, thermoelectric devices, p-n diodes, p-channel transistors, light emitting diodes, and solar cells. In conclusion, current challenges and perspective opportunities are highlighted.

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Section: Cui Applications In Thermo/optoelectronic Devicesmentioning

confidence: 99%

Engineering Copper Iodide (CuI) for Multifunctional p‐Type Transparent Semiconductors and Conductors

et al. 2021

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“…[78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][96][97][98][99][100][101][102][103][104][105][106][107][108][109]. In 2017, Ye and co-workers[104] reported a new p-type conductor Cu (thiourea)I [Cu(Tu)I] in inverted PSCs.…”

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confidence: 99%

A brief review of hole transporting materials commonly used in perovskite solar cells

et al. 2021

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Perovskite solar cells (PSCs) have been brought into sharp focus in the photovoltaic field due to their excellent performance in recent years. The power conversion efficiency (PCE) has reached to be 25.2% in state-ofthe-art PSCs due to the outstanding intrinsic properties of perovskite materials as well as progressive optimization of each functional layer, especially the active layer and hole transporting layer (HTL). In this review, we mainly discuss various hole transporting materials (HTMs) consisting of HTL in PSCs. The progress in PSCs is firstly introduced, then the roles of HTL playing in photovoltaic performance improvement of PSCs are emphasized. Finally, we generally categorize HTMs into organic and inorganic groups and demonstrate both their advantages and disadvantages. Specially, we introduce several typical organic HTMs such as P3HT, PTTA, PEDOT:PSS, spiro-OMeTAD, and inorganic HTMs such as copper-based materials (CuO x , CuSCN, CuI, etc.), nickel-based materials (NiO x ), and twodimensional layered materials (MoS 2 , WS 2 , etc.). On basis of reviewing the reported HTMs in recent years, we expect to provide some enlightenment for design and application of novel HTMs that can be used to further promote PSCs performance.

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“…[59,60] Device stability is another critical issue hindering the commercialization of pero-SCs. [61,62] The stability of the devices stored in ambient conditions with a relative humidity of ≈55% was first evaluated. The PTAA:BDT-Si-based pero-SC without encapsulation retained 86% of its initial PCE after aging 1000 h, whereas this value decreased to 72% for the device based on PTAA HTL ( Figure S22, Supporting Information).…”

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confidence: 99%

Reducing Energy Disorder of Hole Transport Layer by Charge Transfer Complex for High Performance p–i–n Perovskite Solar Cells

Xue

Stuard

et al. 2021

Advanced Materials

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Charge-transport layers (CTLs), which significantly influence charge extraction and recombination, play an important role in improving photovoltaic performance of perovskite solar cells (pero-SCs). [1-3] Solution-processed organic semiconductors with versatile molecular structures, finetuned energy levels, and low-temperature processing have been intensively explored as both hole-transport materials (HTMs) and electron-transport materials (ETMs) for the pero-SCs. [4-7] However, their electronic states in thin films are dramatically affected by molecular stacking, and their weak intermolecular interactions usually have a high degree of energy disorder resulting in low carrier mobility and severe interface recombination. [8-11] Therefore, the performance of p-in pero-SCs, which is highly dependent on OS-CTLs, still lags that of n-i-p pero-SCs. [12,13] Very few OS-CTLs of pero-SCs addressing energy disorder of the CTLs were reported in the literature. Thus far, only the electron transport layer (ETL) has demonstrably reduced energy disorder by enhancing molecular ordering. Huang and co-workers [14] found that the energetic disorder in ETLs such as in [6,6]-phenyl-C 61-butyric acid methyl ester (PCBM) induced band tail and additional electronic states, leading to reduced quasi-Fermi level splitting and low efficiency. They proposed that solvent-annealed PCBM ETL with high ordering could mitigate its energy disorder and increase the power conversion efficiency (PCE) of p-in planar pero-SCs. Similarly, Miyano and co-workers [15] synthesized a highly-crystalline fullerene derivative (C 60 MC 12) to replace amorphous PCBM for enhancing the crystallization of ETL. The highly crystalline ETL could efficiently reduce energy disorder. In comparison, HTMs usually have more flexible chains required for increasing their solubility. These long and flexible chains make it difficult to improve molecular ordering through a simple external treatment, resulting in larger energy disorder and more serious surface recombination. [16] However, few attention has been paid to tuning the energy disorder of the HTL, which is likely more critical to the performance of p-in pero-SCs. Solution-processed organic semiconductor charge-transport layers (OS-CTLs) with high mobility, low trap density, and energy level alignment have dominated the important progress in p-in planar perovskite solar cells (pero-SCs). Unfortunately, their inevitable long chains result in weak molecular stacking, which is likely to generate high energy disorder and deteriorate the charge-transport ability of OS-CTLs. Here, a charge-transfer complex (CTC) strategy to reduce the energy disorder in the OS-CTLs by doping an organic semiconductor, 4,4′-(4,8-bis(5-(trimethylsilyl)thiophen-2-yl) benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl)bis(N,N-bis(4-methoxyphenyl) aniline) (BDT-Si), in a commercial hole-transport layer (HTL), poly[bis(4-phenyl) (2,4,6-trimethylphenyl)amine (PTAA), is proposed. The formation of the CTC makes the PTAA conjugated backbone electron-deficient, resulti...

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Copper-copper iodide hybrid nanostructure as hole transport material for efficient and stable inverted perovskite solar cells

Cited by 42 publications

References 48 publications

Engineering Copper Iodide (CuI) for Multifunctional p‐Type Transparent Semiconductors and Conductors

Engineering Copper Iodide (CuI) for Multifunctional p‐Type Transparent Semiconductors and Conductors

A brief review of hole transporting materials commonly used in perovskite solar cells

Reducing Energy Disorder of Hole Transport Layer by Charge Transfer Complex for High Performance p–i–n Perovskite Solar Cells

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