Recent Progress on Hole‐Transporting Materials for Emerging Organometal Halide Perovskite Solar Cells

Yu, Ze; Sun, Licheng

doi:10.1002/aenm.201500213

Cited by 445 publications

(364 citation statements)

References 136 publications

(308 reference statements)

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“…[7] A great number of HTMs have been developed and applied in PSCs, including various newly designed, inorganic p-type semiconductors, conducting polymers, as well as small molecule hole conductors [8] . 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) that was well studied in solid state DSCs, continues to exhibit high performance in PSCs.…”

mentioning

confidence: 99%

Dopant‐Free Donor (D)–π–D–π–D Conjugated Hole‐Transport Materials for Efficient and Stable Perovskite Solar Cells

Liu

et al. 2016

ChemSusChem

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Abstract:Three novel hole transporting materials (HTM) using the 4-Methoxytriphenylamine (MeOTPA) core were designed and synthesized.The HTMs energy levels were tuned to match with perovskite by introducing electron donating groups symmetrically linked with olefinic bonds as the π bridge. The CH 3 NH 3 PbI 3 -based perovskite solar cells exhibited a remarkable overall power conversion efficiency (PCE) of 16.1 % without any dopants and additives based on 4-((E)-4-(bis(4-methoxyphenyl)amino)styryl)-N-(4-((E)-4-(bis(4methoxyphenyl)amino)styryl)phenyl)-N-(4-methoxyphenyl)aniline (Z34) , which is comparable to 16.7 % obtained by p-doped spiro-OMeTAD-based device. Importantly, the devices based-on three HTMs show relatively better stability compared to devices based on spiro-OMeTAD when aged under ambient air of 30% relative humidity in the dark. 2Increasing energy demands and concerns about global warming drive the exploration of clean, inexpensive and renewable energy sources. Recently, the photovoltaic community has witnessed a rapid emergence of a new class of solid-state heterojunction solar cells based on solution-processable organometal halide perovskite absorbers [1][2][3] . The power conversion efficiency (PCE) of solid-state perovskite solar cells (PSCs) has been quickly increased to over 20% [4][5][6] because of their unique characteristics, such as a broad spectral absorption range, large absorption coefficient, high charge carrier mobility and long diffusion length.[2]In the configuration of a PSC, the hole transporting material (HTMs) plays the key role of promoting hole migration, as well as preventing internal charge recombination. [7] A great number of HTMs have been developed and applied in PSCs, including various newly designed, inorganic p-type semiconductors, conducting polymers, as well as small molecule hole conductors [8] . 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) that was well studied in solid state DSCs, continues to exhibit high performance in PSCs. Due to its relatively low hole mobility and its tedious synthesis strongly correlated to its production cost, numerous alternative HTMs have been explored with an aim to replace such a material [9][10][11][12][13][14][15][16][17][18][19][20] . Although inorganic HTMs (CuI and CuSCN) have drawn much attention due to their high hole mobilities and low production cost [21] ,polymeric HTMs, such as conjugated polytriarylamine (PTAA) [22] , poly(3-hexylthiophene-2,5-diyl) (P3HT) [23] etc., have also shown competitive performances in PSCs, small molecular HTMs have advantages of their convenient purification, controllable molecular structures and relatively high efficiency [24] .Regarding small molecule HTMs incorporated with dopants, the PCE of the dopant-free HTM based devices are consistently lying between 10% to 13% [25][26][27][28][29][30][31][32][33][34][35][36] , few are over 15%. [37][38][39][40] Herein, we report the synthesis and characterization of three novel dopant-free 4-Methoxytriphenylamine (Me...

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confidence: 99%

Dopant‐Free Donor (D)–π–D–π–D Conjugated Hole‐Transport Materials for Efficient and Stable Perovskite Solar Cells

Liu

et al. 2016

ChemSusChem

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“…Recently, many HTMs have been demonstrated to replace spiro-OMeTAD aiming for low-cost and stability. The p-type contact materials for PSCs can be categorized into organic and inorganic semiconductors [30,31]. Organic HTMs, including small molecular and polymeric HTMs, are low-cost alternatives capable of low-temperature device processing.…”

Section: M`eṕ Injectedq ñ M´(6)mentioning

confidence: 99%

Inorganic p-Type Semiconductors: Their Applications and Progress in Dye-Sensitized Solar Cells and Perovskite Solar Cells

Yum

Moon

et al. 2016

Energies

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Considering the increasing global demand for energy and the harmful ecological impact of conventional energy sources, it is obvious that development of clean and renewable energy is a necessity. Since the Sun is our only external energy source, harnessing its energy, which is clean, non-hazardous and infinite, satisfies the main objectives of all alternative energy strategies. With attractive features, i.e., good performance, low-cost potential, simple processibility, a wide range of applications from portable power generation to power-windows, photoelectrochemical solar cells like dye-sensitized solar cells (DSCs) represent one of the promising methods for future large-scale power production directly from sunlight. While the sensitization of n-type semiconductors (n-SC) has been intensively studied, the use of p-type semiconductor (p-SC), e.g., the sensitization of wide bandgap p-SC and hole transport materials with p-SC have also been attracting great attention. Recently, it has been proved that the p-type inorganic semiconductor as a charge selective material or a charge transport material in organometallic lead halide perovskite solar cells (PSCs) shows a significant impact on solar cell performance. Therefore the study of p-type semiconductors is important to rationally design efficient DSCs and PSCs. In this review, recent published works on p-type DSCs and PSCs incorporated with an inorganic p-type semiconductor and our perspectives on this topic are discussed.

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“…Consequently, the development of more efcient buffer layer materials should be crucial for further improvements of the PCEs in perovskite solar cells. Although substantial efforts have already been devoted to the development of improved hole transporting materials for buffer layers, 21,22 the number of high performance HTMs still remains limited. 22 Hence, 2,2 ,7,7 tetrakis(N,N di p methoxyphenylamine) 9,9 spirobi uorene (Spiro OMeTAD, Figure 6b), which is traditionally used in solid state dye sensitized solar cells, 23 remains, despite its high cost, the standard buffer material, even in perovskite solar cells.…”

Section: Molecular Designmentioning

confidence: 99%

Partially Oxygen-Bridged Triphenylamines with a Quasiplanar Structure as a Key Scaffold for Hole-Transporting Materials

Wakamiya

Nishimura²,

Murata³

2016

J. Synth. Org. Chem. Jpn.

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Organic electronics have attracted much attention as they promise great potential for applications as lightweight and exible electronic devices. In order to improve the performance of such devices, the development of improved charge transporting materials is of paramount importance. The molecular design of such materials should aim to control not only the electronic structure, but also the molecular orientation of these compounds in the solid state. For the development of materials with improved charge transporting properties, we focused on compounds with a quasiplanar structure, i.e. a structure that is slightly twisted from planarity. As a model skeleton, we designed and synthesized partially oxygen bridged triarylamines. On the basis of their quasiplanar skeletons as key units, we have developed hole transporting materials (HTMs) that were subsequently used in organic electronics devices, such as OLEDs and perovskite solar cells, and led to improved performances. This account article illustrates our endeavors regarding the development of such functional π conjugated materials, with a focus on facile and ef cient synthetic strategies.

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Recent Progress on Hole‐Transporting Materials for Emerging Organometal Halide Perovskite Solar Cells

Cited by 445 publications

References 136 publications

Dopant‐Free Donor (D)–π–D–π–D Conjugated Hole‐Transport Materials for Efficient and Stable Perovskite Solar Cells

Dopant‐Free Donor (D)–π–D–π–D Conjugated Hole‐Transport Materials for Efficient and Stable Perovskite Solar Cells

Inorganic p-Type Semiconductors: Their Applications and Progress in Dye-Sensitized Solar Cells and Perovskite Solar Cells

Partially Oxygen-Bridged Triphenylamines with a Quasiplanar Structure as a Key Scaffold for Hole-Transporting Materials

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