A new thermal-stable truxene-based hole-transporting material for perovskite solar cells

Wang, Jiang; Chen, Yu; Liang, Mao; Ge, Gaoyang; Zhou, Renjie; Sun, Zhe; Xue, Song

doi:10.1016/j.dyepig.2015.11.004

Cited by 36 publications

(23 citation statements)

References 40 publications

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“…Thermal stability of PSCs also raises a serious concern, that subjects to a high temperature causing degradation of the device . Some researchers say that the instability of perovskite is linked to the grain boundaries (GBs) or surface, to cap these GBs with suitable protective materials is the attractive strategy to improve the stability of perovskites.…”

Section: Instability Of Phtotoactive Layer Of Pscsmentioning

confidence: 99%

A Review of Perovskites Solar Cell Stability

Wang

Mujahid

Duan

et al. 2019

Adv Funct Materials

958

849

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the perovskite material onto transparent substrates covered with a compact TiO 2 layer and an optional mesoporous TiO 2 (or Al 2 O 3 ) scaffold layer. [34] The p-i-n structure, which involves depositing the perovskite material onto transparent substrates which are covered with an HTL, such as the poly(3,4-ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS). [35] So far, PSCs based on both mesoporous and planar structure exhibit high performance and stability, however, the comparison of the advantages of two different strucutres in stability is still under debate. [36] Mesoporous Perovskite Solar CellsRecently, a new generation of photovoltaic converters, mesoporous solar cell [37] has attracted more consideration due to their low material cost, simple fabrication process, high energy conversion efficiencies, [38] like dye-sensitized solar cell, [38c] and mesoporous perovskite solar cell. [5a,21,39] PCE up to 9.7% has been achieved by using CH 3 NH 3 PbI 3 (MAPbI 3 ) perovskite nanocrystals as the light absorber to fabricate a solid-state MPSC. [21] After that the research focuses on solid-state MSCs began to transfer from DSSCs to MPSCs. [32a,40] In an MPSC, a compact layer is usually deposited on fluorine doped tin oxide (FTO) layer, which usually extracts electrons and block holes. Three strategies are broadly used for depositing the TiO 2 layer: 1) Spin-coating the colloidal dispersion of TiO 2 nanoparticles followed by a thermal treatment (titanium source: TiCl 4 , [41] titanium isopropoxide, [42] tetra-n-butyl-titanate; [43] 2) spin-coating titanium precursor solutions followed by a thermal treatment (titanium source: TiCl 4 , [44] titanium isopropoxide, [23] titanium diisopropoxide bis(acetylacetonate) 12 ); 3) spray pyrolysis deposition (titanium source: titanium diisopropoxide bis(acetylaceto nate) 18 ). [45] Low-temperature sintering approaches to prepare an

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Section: Instability Of Phtotoactive Layer Of Pscsmentioning

confidence: 99%

A Review of Perovskites Solar Cell Stability

Wang

Mujahid

Duan

et al. 2019

Adv Funct Materials

958

849

View full text Add to dashboard Cite

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“…Truxene-based material exhibits a high decomposition temperature (432 o C) and glass transition temperature (134 o C) and can be used as HTM in PSCs, which is beneficial to the morphology stability of the HTM and the device. [208] Doping with more hydrophobic dopant such as Ag-TFSI to improve the hydrophobicity of Spiro-OMeTAD or using other hydrophobic p-type organic semiconductor as holetransporting materials may enhance the long-term stability of the PSCs [172] . However, most of the organic semiconductor containing carbon-carbon double bond may broke down upon prolonged illumination, resulting in the degradation of the HTMs and devices.…”

Section: Hydrophobic Organic Semiconductor As Htmmentioning

confidence: 99%

Recent progress in stabilizing hybrid perovskites for solar cell applications

Chen

Cai

Yang

et al. 2017

Journal of Power Sources

100

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Hybrid inorganic-organic perovskites have quickly evolved as a promising group of materials for solar cells and optoelectronic applications mainly owing to the inexpensive materials, relatively simple and versatile fabrication and high power conversion efficiency (PCE). The certified energy conversion efficiency for perovskite solar cell (PSC) has reached above 20%, which is compatible to the current best for commercial applications. However, long-term stabilities of the materials and devices remain to be the biggest challenging issue for realistic implementation of the PSCs. This article discusses the key issues related to the stability of perovskite absorbing layer including crystal structural stability, chemical stability under moisture, oxygen, illumination and interface reaction, effects of electron-transporting materials (ETM), hole-transporting materials (HTM), contact electrodes and preparation conditions. Towards the end, prospective strategies for improving the stability of PSCs are also briefly discussed and summarized. We focus on recent understanding of the stability of materials and devices and our perspectives about the strategies for the stability improvement.

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“…Especially, the synthesis of the Spiro core in 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) requires several steps with a poor overall yield (15 to 30% depending on the synthesis route) [203] and is therefore often replaced by synthetically more accessible cores. Simple moieties such as phenyl, [206] biphenyl, [207] carbazole, [207,208] triphenylamine, [209] or triptycene [210] can be used to reduce the cost, and spiro-based alternatives such as spiro[fluorene-9,9′-xanthene], [211,212] spiro[cyclopenta [2,1- [213] Li et al introduced heteroatoms in the core by using the simple 3,4-ethylenedioxythiophene (EDOT) moiety. Additionally, they were able to perform their reaction in one pot to further reduce the cost.…”

Section: Long-term Viability: Stability and Sustainabilitymentioning

confidence: 99%

Capturing the Sun: A Review of the Challenges and Perspectives of Perovskite Solar Cells

Petrus

Schlipf

Cheng

et al. 2017

Advanced Energy Materials

312

201

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following statement: These materials can be processed from solution and yet exhibit optoelectronic materials properties described in classic solid-state physics textbooks. This unprecedented combination has led to photovoltaic devices that can be processed at room temperature and achieve performance levels similar to industry giant polycrystalline silicon, from a starting point of 3.8% in 2009. [1][2][3][4] The first light-emitting electrochemical cells [5] and diodes [6][7][8] have also been introduced recently, leading to tunable light emission spectra and internal quantum efficiencies exceeding 15%.The road towards these achievements has been marked by a constant improvement of perovskite deposition techniques fueled by our increasing understanding of the crystallization processes. The choice of deposition technique, either from solution or vapor, and the composition and order in which precursor species are applied has a great influence on the crystallization kinetics. Here, one can distinguish one-step methods where the perovskite is formed from a precursor mixture dissolved in a common solution, and two-step methods where the inorganic compound is deposited first and transformed to the perovskite phase later by addition of the organic constituents. [9][10][11] Furthermore, many parameters during processing can have an effect on the crystallization mechanism and consequently on film morphology, such as the choice of solvents, concentrations and processing additives that are often not incorporated into the final product. [11][12][13] We discuss this aspect in Section 2, where we focus our attention on the most commonly employed solution-based techniques. Additionally, as for any new technology trying to displace an incumbent technology, higher efficiencies, lower costs, reproducibility, stability, and sustainability are paramount. In particular, reproducibility has been a major challenge in perovskite solar cells from the beginning: small variations in morphology, like crystal size, film roughness, and pinholes can have detrimental effects on photovoltaic performance. [14] On the other hand, current-voltage measurements often showed a hysteresis that is rarely seen in other photovoltaic technologies. [15] These topics are highlighted in Sections 3 and 4. Finally, in Section 5 we discuss the framework for market introduction, such as cost reduction by choosing low-cost charge transport layers, or how the lifetime of perovskite absorbers can be extended by the choice of materials composition.Hybrid metal halide perovskites have become one of the hottest topics in optoelectronic materials research in recent years. Not only have they surpassed everyone's expectations and achieved similar performance as tried and true polycrystalline silicon photovoltaic devices, but they are also finding applications in a variety of different fields, including lighting. The main advantages of hybrid metal halide perovskites are simple processability, compatible with large-scale solution processing such as roll-to-roll printing, a...

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A new thermal-stable truxene-based hole-transporting material for perovskite solar cells

Cited by 36 publications

References 40 publications

A Review of Perovskites Solar Cell Stability

A Review of Perovskites Solar Cell Stability

Recent progress in stabilizing hybrid perovskites for solar cell applications

Capturing the Sun: A Review of the Challenges and Perspectives of Perovskite Solar Cells

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