Engineering interface structures between lead halide perovskite and copper phthalocyanine for efficient and stable perovskite solar cells

Kim, Y. C.; Yang, Tae‐Youl; Jeon, Nam Joong; Im, Jino; Jang, Sooyoung; Shin, Tae Joo; Shin, Hyunjung; Kim, S.; Lee, E.; Noh, Jun Hong; Seok, Sang Il; Seo, Jangwon

doi:10.1039/c7ee01931a

Cited by 182 publications

(157 citation statements)

References 43 publications

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“…Although2 ,2',7,7'-tetrakis[N,N-bis(p-methoxyphenyl)amino]-9,9'-spirobifluorene (spiro-OMeTAD) and poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) are standard choicesf or HTMs in high-performance PSCs, [15][16][17] the PCEs of these PSCs decrease drastically under high-temperature conditions because of the low phase-transition temperatures of the HTMs. [18,19] Research efforts have therefore been directed towards finding solution-processable HTMs possessingn ot only suitable energy levels for efficient hole extraction but also high thermal durability for industrial processes. [14,20,21] HTMs containing polycyclic aromatic skeletons, such as truxene, [22,23] triazatruxene, [24,25] benzotrithiophene, [26] or thiolated nanographene, [27] as the central core attachedt oa rylamine derivatives have been developed.…”

Section: Introductionmentioning

confidence: 99%

Influence of Alkoxy Chain Length on the Properties of Two‐Dimensionally Expanded Azulene‐Core‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells

Truong

Lee

Nakamura

et al. 2019

Chemistry A European J

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As eries of two-dimensionally expandeda zulenecore-based p systemsh ave been synthesized with different alkyl chain lengths in the alkoxy moieties connected to the partially oxygen-bridged triarylamine skeletons. The thermal, photophysical, and electronic properties of each compound were evaluatedt od etermine the influence of the alkyl chain length on their effectiveness as hole-transporting materials (HTMs)i np erovskites olar cells (PSCs). All the synthesized molecules showedp romising material properties, including high solubility,t he formationo ff lat and amorphous films, and optimal alignment of energy levels with perovskites. In particular, the derivatives with methyl and n-butyli nt he side chains retained amorphous stability up to 233 and 159 8C, respectively.S uch short alkoxyc hains also resulted in improvede lectrical device properties. The PSC device fabricated with the HTM with n-butyl side chains showedt he best performance with ap owerc onversione fficiency of 18.9 %, whichc ompares favorably with that of spiro-OMeTAD-based PSCs (spiro-OMeTAD = 2,2',7,7'-tetrakis[N,Nbis(p-methoxyphenyl)amino]-9,9'-spirobifluorene).[a] Dr.

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Section: Introductionmentioning

confidence: 99%

Influence of Alkoxy Chain Length on the Properties of Two‐Dimensionally Expanded Azulene‐Core‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells

Truong

Lee

Nakamura

et al. 2019

Chemistry A European J

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“…Many efforts have been focused toward avoiding the degradation of the solar cells by, for example by modifying the perovskite active layer and by employing encapsulating layers . In this context it was also shown that engineering the interface between the perovskites and the charge transport layers increases the lifetime of the photovoltaic devices . Hence interfacial engineering can have beneficial effects on both charge transport and stability of the halide perovskite solar cells.…”

Section: Introductionmentioning

confidence: 99%

Interfaces Between Graphene‐Related Materials and MAPbI₃: Insights from First‐Principles

Volonakis

Giustino

2018

Adv Materials Inter

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Given the unique and complementary properties of halide perovskites and graphene, it has been a natural step to explore their combination for novel high‐performance solar cells. Within this research news the latest theoretical and computational works on interfaces between the prototype perovskite absorber methylammonium lead triiodide (CH3NH3PbI3) and graphene related materials (GRMs) are reviewed. In particular, recent works based on quantum‐mechanical calculations from first‐principles that probe the structural and electronic properties of interfaces between CH3NH3PbI3, pristine graphene, graphene‐oxide, and reduced graphene‐oxide are reviewed. How these studies investigate the fundamental mechanisms by which GRMs can improve perovskite based photovoltaics, and how these relate to the several available experimental studies that have clearly shown the positive effects of GRMs on both the charge extraction rates, and the stability of perovskite solar cells are discussed. Finally, the main challenges that remain to be addressed in order to model more realistic systems and further unravel the atomic‐scale details that underlie the properties of GRM/perovskite interfaces are discussed.

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“…The interaction between ETHH NP arrays and perovskite was explored by photovoltage spectroscopy and simulated extinction spectrum. For the region from 350 to 600 nm, we found that the ETHH NP arrays, as a hole transport layer, improved the plasmonic hot‐electron injection efficiency from the ETHH NP arrays into the perovskite film after excitation of the Au plasmon band, inducing higher photovoltage and detectable blue shift as band structures of metal/semiconductor contact (Figure d,e) . For the spectra between 600 and 950 nm, ETHH NP arrays covered by perovskite film exhibited multipeak spectra due to quantization of angular momenta.…”

mentioning

confidence: 86%

Superficial‐Layer‐Enhanced Raman Scattering (SLERS) for Depth Detection of Noncontact Molecules

et al. 2018

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which requires some type of sorption to the analytes. Therefore, analytes suitable for SERS detection are restricted to mole cules that have affinity to the enhancing nanostructures.Here, we developed a superficiallayer enhanced Raman scattering (SLERS) technique for detecting analytes that are noninteractive with Ramanactive sub strates, by covering elongated tetrahexa hedral gold nanoparticle (ETHH Au NP) arrays with a superficial perovskite film. These ETHH NP arrays provide uni form and highdensity SERS hotspot platforms, [18,19] and the perovskite film as a dielectric media retards attenuation of the electromagnetic evanescent wave. The decay of localized surface plasmon in perovskite film is depressed along the vertical direction away from the nanostructured surface, indicating that SLERS occurs in the superficial layer rather than just on the ETHH Au NP surface. The information presented here will be useful for both understanding the mechanism of SLERS, and for the wide spread application of Raman sensors.ETHH Au NPs have puncheonlike quasi1D shapes with an average length of 107.7 ± 2.6 nm, average width of 62.0 ± 1.1 nm, and aspect ratio of 1.74 (Figure 1a). There are two surface plasmon resonance (SPR) absorption peaks, located separately at 540 and 698 nm (Figure S1, Supporting Infor mation); the former can be assigned to the transverse surface plasmon resonance (TvSPR), while the latter is believed to belong to the longitudinal surface plasmon resonance (LtSPR). Highresolution transmission electron microscopy images (Figure 1b and Figure S2, Supporting Information) show characteristic dihedral angles of 155.5°, 133.2°, and 154.8° along the projection direction [001], consistent with theoretical values between {010} and {730} facets. [20] The highindex facets are regarded as a periodic repetition of two {210} and one {310} subfacets (Figure 1c,d).To prepare uniform hotspot platforms, these highquality ETHHs Au NPs were controlled to assemble largearea vertical arrays by slow solvent evaporation (Figure 1e). [21][22][23][24] The ETHH NP arrays were transferred to solid substrates on the order of a few hundreds of micrometers in size (Figure 1f). The hex agonallike model packed by headup ETHH NPs was verified on highmagnification scanning electron microscopy (SEM) images, as well as by the fast Fourier transform (FFT) pattern (Figure 1g).Synchrotronbased smallangle Xray scattering (SAXS) was performed to characterize the structure of the ETHH NP Although the strength of Raman signals can be increased by many orders of magnitude on noble metal nanoparticles, this enhancement is confined to an extremely short distance from the Raman-active surface. The key to the development of Raman spectroscopy for applications in diagnosis and detection of cancer and inflammatory diseases, and in pharmacology, relies on the capability of detecting analytes that are noninteractive with Raman-active surfaces. Here, a new Raman enhancement system is constructed, superficiallayer-enhanced Raman scattering (SLERS), by coverin...

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Engineering interface structures between lead halide perovskite and copper phthalocyanine for efficient and stable perovskite solar cells

Abstract: CuPC-applied perovskite solar cells show excellent long-term thermal stability which is attributed to the reliable interface and intrinsic heat-resistance of CuPC.

Cited by 182 publications

References 43 publications

Influence of Alkoxy Chain Length on the Properties of Two‐Dimensionally Expanded Azulene‐Core‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells

Influence of Alkoxy Chain Length on the Properties of Two‐Dimensionally Expanded Azulene‐Core‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells

Interfaces Between Graphene‐Related Materials and MAPbI₃: Insights from First‐Principles

Superficial‐Layer‐Enhanced Raman Scattering (SLERS) for Depth Detection of Noncontact Molecules

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Engineering interface structures between lead halide perovskite and copper phthalocyanine for efficient and stable perovskite solar cells

Abstract: CuPC-applied perovskite solar cells show excellent long-term thermal stability which is attributed to the reliable interface and intrinsic heat-resistance of CuPC.

Cited by 182 publications

References 43 publications

Influence of Alkoxy Chain Length on the Properties of Two‐Dimensionally Expanded Azulene‐Core‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells

Influence of Alkoxy Chain Length on the Properties of Two‐Dimensionally Expanded Azulene‐Core‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells

Interfaces Between Graphene‐Related Materials and MAPbI3: Insights from First‐Principles

Superficial‐Layer‐Enhanced Raman Scattering (SLERS) for Depth Detection of Noncontact Molecules

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Interfaces Between Graphene‐Related Materials and MAPbI₃: Insights from First‐Principles