One plus one greater than two: high-performance inverted planar perovskite solar cells based on a composite CuI/CuSCN hole-transporting layer

Wang, Haoxin; Yu, Ze; Lai, Jianbo; Song, Xinkai; Yang, Xichuan; Hagfeldt, Anders; Sun, Licheng

doi:10.1039/c8ta07332e

Cited by 75 publications

(46 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It showed a small increase of photocurrent for KCl‐modified NiO X films . In addition, the electrical conductivity of CuI/CuSCN composite films was revealed according to the current–voltage curves obtained from the C‐AFM . Such improved conductivity of hole transporting layer is beneficial to the efficient transfer of photogenerated holes between and within layers.…”

Section: Applications Of C‐afm Techniquementioning

confidence: 95%

Emerging Conductive Atomic Force Microscopy for Metal Halide Perovskite Materials and Solar Cells

Zhang

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

Metal halide perovskite materials, benefiting from a combination of outstanding optoelectronic properties and low‐cost solution‐preparation processes, show tremendous potential for optoelectronics and photovoltaics. However, the nanoscale inhomogeneities of the electronic properties of perovskite materials cause a number of difficulties, such as recombination, stability, and hysteresis, all of which seriously restrict device performance. Scanning probe microscopy, as a high‐resolution imaging technique, has been widely used to connect local properties and micro‐area morphologies to overall device performance. Conductive atomic force microscopy (C‐AFM) can realize a real‐space visualization of topography coupled with optoelectronic properties on a microscopic scale and thereby is uniquely suited to probe the local effects of perovskite materials and devices. The fundamental principles, alternative operation modes, and development of C‐AFM are comprehensively reviewed, and applications in perovskite solar cells (PSCs) for electronic transport behavior, ion migration and hysteresis, ferroelectric polarization, and facet orientation investigation are discussed. A comprehensive understanding and summary of up‐to‐date applications in PSCs is beneficial to further fully exploit the potential of such an emerging technique, so as to provide a novel and effective approach for perovskite materials analysis.

show abstract

Section: Applications Of C‐afm Techniquementioning

confidence: 95%

Emerging Conductive Atomic Force Microscopy for Metal Halide Perovskite Materials and Solar Cells

Zhang

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…A barrier design in PSCs is thought to be an effective strategy for stability enhancement. Recently, kinds of bilayer‐structured HTLs have been developed for enhancing the permeation barrier, which could considerably block the undesired ionic or molecular migrations among the layers in PSCs . For example, Jung et al developed a double‐layered halide architecture (DHA) .…”

Section: Recent Important Progresses On Interfacial Materialsmentioning

confidence: 99%

Review on Practical Interface Engineering of Perovskite Solar Cells: From Efficiency to Stability

et al. 2019

View full text Add to dashboard Cite

Exceptionally high efficiencies for organic–inorganic hybrid perovskite solar cells (PSCs) have been achieved. However, their operational stability still needs to be improved. The intrinsic instability of halide perovskites caused by the presence of volatile organic cations, as well as the degradation of hybrid perovskites induced by the adverse permeation of environmental water (H2O)/oxygen (O2) and the undesired ion diffusion or migration are the major reasons. Beyond strengthening perovskites themselves, interface engineering is now regarded as a valid strategy to prolong device lifetime by preventing the undesired degradation pathways. This comprehensive review highlights the utilization of practical interface engineering for enhancing the efficiency and stability of organic–inorganic lead halide PSCs. First, the impacts of interface design on the energy‐level alignment and carrier dynamics are overviewed. Second, recent progresses on the development of interfacial materials for simultaneously achieving high efficiency and stability of PSCs are summarized. At last, the interfacial layer design principles along with future outlook of this rapidly developing field are discussed.

show abstract

“…Such an electronic configuration leads them to possess quite similar, but also different properties compared with alkali and alkali‐earth elements. Cu is the first element in the ds region, whose compounds such as CuI and CuSCN are suitable hole transport materials in PVSCs . Accordingly, Bian et al innovatively introduced CuSCN, CuI and Cu(Tu)I in MAPbI 3 to prepare HTL‐free PVSCs with a structure of ITO/MAPbI 3 /C 60 /BCP/Ag with the aim of structure simplification along with cost reduction.…”

Section: Metal Cations In the Ds Regionmentioning

confidence: 99%

Metal Cations in Efficient Perovskite Solar Cells: Progress and Perspective

et al. 2019

View full text Add to dashboard Cite

dramatically stimulate the development of perovskite solar cells (PVSCs). Benefiting from the constant optimization of functional materials and preparation methods, the power conversion efficiency (PCE) of PVSCs has skyrocketed from 3.8% [15] to a certified value of 24.2% [16] in several years, on a par with the commercialized photovoltaics such as thin-film CdTe and silicon solar cells. [17] In general, the 3D metal halide perovskites possess an ABX 3 structure, where A is a monovalent cation, B is a divalent metal cation, and X is a monovalent halide anion. The ionic radius have to meet the requirement of Goldschmidt's empirical tolerance factor ( (where r is the ionic radius, 0.8 < t < 1) to maintain the 3D perovskite framework. [18,19] For photovoltaic applications, the A-site typically utilizes methylammonium (MA + ), formamidine (FA + ) or Cs + , B can be Pb 2+ or Sn 2+ and X is Br − or I − . Among them, each cxombination can individually form a photoactive perovskite phase and most of the milestone PCEs were attained by mixing the composition of MA/FA/Cs cations and I/Br anions. [20][21][22][23][24][25][26] Beyond all doubt, the properties of perovskite, such as morphology, crystallinity, and trap-state density, have a major influence on the photovoltaic performance of PVSCs. For instance, the photovoltage mainly stems from the splitting of the quasi-Fermi levels in perovskite under illumination. [27,28] Moreover, trap states generated by undercoordinated atoms can trigger nonradiative recombination, ion migration and stability issues. [29] Therefore, various strategies focusing on preparation methods, [30,31] additive engineering [32] and interface modification [33][34][35] have been developed to optimize perovskite quality. Among them, optimizations on fabrication approaches are the dominant driving force to boost the PCE of PVSCs and have been extensively investigated from initial one step deposition, [36][37][38] through two steps, [39,40] vacuum deposition [41,42] and finally to antisolvent engineering. [43][44][45] But beyond that, additive engineering with the advantage of directly tailoring the properties of perovskite is regarded as a paramount and effective approach. Quintessentially, the additives are broken down into two categories: 1) organic additives including small molecules, fullerenes and polymers; 2) inorganic additives including metal cations, inorganic acids and nanoparticles. Almost all of them can govern the crystallization of perovskite and enhance stability. [32] However, organic additives generally passivate only Metal halide perovskite solar cells (PVSCs) have revolutionized photovoltaics since the first prototype in 2009, and up to now the highest efficiency has soared to 24.2%, which is on par with commercial thin film cells and not far from monocrystalline silicon solar cells. Optimizing device performance and improving stability have always been the research highlight of PVSCs. Metal cations are introduced into perovskites to further optimize the quality, and this strategy is...

show abstract

One plus one greater than two: high-performance inverted planar perovskite solar cells based on a composite CuI/CuSCN hole-transporting layer

Abstract: Low-temperature solution-processed CuI/CuSCN composites have been successfully demonstrated to be effective hole-transporting layers for inverted planar perovskite solar cells.

Cited by 75 publications

References 40 publications

Emerging Conductive Atomic Force Microscopy for Metal Halide Perovskite Materials and Solar Cells

Emerging Conductive Atomic Force Microscopy for Metal Halide Perovskite Materials and Solar Cells

Review on Practical Interface Engineering of Perovskite Solar Cells: From Efficiency to Stability

Metal Cations in Efficient Perovskite Solar Cells: Progress and Perspective

Contact Info

Product

Resources

About