2015
DOI: 10.1002/admi.201400528
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Abstract: Lead halide perovskites are currently attracting a great deal of attentions due to their great promise as light absorbers in high‐efficiency hybrid organic–inorganic solid‐state solar cells. The reliable information about interface energetics of lead halide perovskite‐based interfaces is indispensable to unraveling the photon harvesting and charge separation process for this emerging photovoltaic technology. Here, we provide the direct evidence on energy level alignments at the hybrid interfaces between lead h… Show more

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Cited by 127 publications
(153 citation statements)
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“…5(a), a larger injection barrier of 0.8 eV was found, due to the deeper VB of the bromide compound, clearly making spiro-MeOTAD a poor choice for these wide band gap active layers. A very similar energy level offset of 0.8 eV was found by Wang et al, 46 who studied the interface between the mixed perovskite MAPbIBr 2 and spiro-MeOTAD as shown in Fig. 5(b).…”
Section: Energetic Alignment To Organic Transport Layerssupporting
confidence: 81%
See 1 more Smart Citation
“…5(a), a larger injection barrier of 0.8 eV was found, due to the deeper VB of the bromide compound, clearly making spiro-MeOTAD a poor choice for these wide band gap active layers. A very similar energy level offset of 0.8 eV was found by Wang et al, 46 who studied the interface between the mixed perovskite MAPbIBr 2 and spiro-MeOTAD as shown in Fig. 5(b).…”
Section: Energetic Alignment To Organic Transport Layerssupporting
confidence: 81%
“…Some of the published studies that will be discussed in the following are based on actual device architectures while others can be considered to be more general studies, looking at various organics to establish trends in the alignment. Non-organic top contact interfaces, like the alignment to Au 19 or MoO 3 , 18,46 have been investigated but will not be further considered here. Throughout this discussion, it has to be kept in mind that the perovskite preparation conditions are likely to influence the measured interface alignment, and differences in data evaluation can lead to different conclusions regarding the relative positions of the energy levels.…”
Section: Energetic Alignment To Organic Transport Layersmentioning
confidence: 99%
“…There is a 0.6 eV energy offset between the work-function of ITO and VBM of CH 3 NH 3 PbI 3ÀX Cl X . Such an energy offset may constrain the built-in field and thus result in the thermionic losses for holes and hence a loss in V OC [36,37]. This suggests that a higher PCE can be expected for these HTM-free perovskite solar cells if a TCO electrode with a higher work-function were used.…”
Section: Resultsmentioning
confidence: 99%
“…3,15 Organometal trihalide perovskites have properties differ considerably from their constituting components. [16][17] For example, MAI and PbCl 2 are themselves wide energy gap semiconductors and therefore are electrically and optically inert. Yet, perovskites show excellent conductivities for both electrons and holes 1, [18][19][20] , as well as broad absorption over the visible spectrum.…”
Section: Introductionmentioning
confidence: 99%
“…6,16,[30][31] The large difference in the absorption spectra of perovskite and its constituents (i.e. MAI and PbCl 2 ) implies a strong charge interaction upon contact between MAI and PbCl 2 .…”
Section: Introductionmentioning
confidence: 99%