Effect of Mesostructured Layer upon Crystalline Properties and Device Performance on Perovskite Solar Cells

Listorti, Andrea; Juárez-Pérez, Emilio J.; Frontera, C.; Roiati, Vittoria; Garcia-Andrade, Laura; Colella, Silvia; Rizzo, Aurora; Ortiz, Pablo; Mora‐Seró, Iván

doi:10.1021/acs.jpclett.5b00483

Cited by 80 publications

(71 citation statements)

References 36 publications

(85 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Such as shift is also reported by Mora-Sero and coworkers, 16 but no explanation is provided. A shift to lower 2θ implies increase in lattice parameters, that is, a volume expansion of the lattice by ∼1%, corresponding to peak shift of ∼0.075°.…”

Section: The Journal Of Physical Chemistry Lettersmentioning

confidence: 48%

“…Using photoluminescence (PL) spectroscopy, they observe dramatic differences in the electron diffusion lengths (L D ), with L D values for planar, mesoscopic, and mesoscopic-planar hybrid PSCs of 400, 40, and 260 nm, respectively. 16 They conclude that the OTP in the mesoporous oxide controls the contact properties, while the OTP capping layer controls the photovoltaic performance. Nanova et al 17 have studied mesoscopic-planar MAPbI 3−x Cl x films using transmission electron microscopy (TEM), in conjunction with electron energy loss spectroscopy (EELS), to overcome some of the limitations of SEM, Raman spectroscopy, and XRD.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Crystal Morphologies of Organolead Trihalide in Mesoscopic/Planar Perovskite Solar Cells

Zhou

Vasiliev

et al. 2015

J. Phys. Chem. Lett.

100

102

View full text Add to dashboard Cite

ABSTRACT:The crystal morphology of organolead trihalide perovskite (OTP) light absorbers can have profound influence on the perovskite solar cells (PSCs) performance. Here we have used a combination of conventional transmission electron microscopy (TEM) and high-resolution TEM (HRTEM), in cross-section and plan-view, to characterize the morphologies of a solution-processed OTP (CH 3 NH 3 PbI 3 or MAPbI 3 ) within mesoporous TiO 2 scaffolds and within capping and planar layers. Studies of TEM specimens prepared with and without the use of focused ion beam (FIB) show that FIBing is a viable method for preparing TEM specimens. HRTEM studies, in conjunction with quantitative X-ray diffraction, show that MAPbI 3 perovskite within mesoporous TiO 2 scaffold has equiaxed grains of size 10−20 nm and relatively low crystallinity. In contrast, the grain size of MAPbI 3 perovskite in the capping and the planar layers can be larger than 100 nm in our PSCs, and the grains can be elongated and textured, with relatively high crystallinity. The observed differences in the performance of planar and mesoscopic-planar hybrid PSCs can be attributed in part to the striking differences in their perovskite-grain morphologies. S olar cells based on solution-processed organometal trihalide perovskite (OTP) have emerged as a new "player" in the photovoltaics (PVs) field over the past few years. 1−4Since Miyasaka and coworkers 5 first reported the use of methylammonium lead triiodine (CH 3 NH 3 PbI 3 or MAPbI 3 ) perovskite as light harvester, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has topped 20% within a short period of time.6 On the basis of the architecture of the photoactive OTP layer, the PSC embodiments are broadly classified as 1−4,7 (i) mesoscopic, (ii) planar, and (iii) mesoscopic-planar hybrid. In the mesoscopic PSC the photoactive layer consists of a thick (typically 300 to 1000 nm) mesoporous oxide (TiO 2 , Al 2 O 3 ) scaffold fully infiltrated by the OTP. The scaffold helps anchor the OTP, and in the case of TiO 2 it provides electron-conduction pathways. 8 The planar PSC is based on a thin film of OTP without the mesoporous oxide scaffold, and it has gained popularity due to the enhanced light absorption and simpler architecture; however, planar PSCs are generally prone to photocurrent (J)−voltage (V) hysteresis issues. 9 The third emerging type of PSCs with mesoscopicplanar hybrid structure aspires to combine the two structures and their desirable attributes into one. These PSCs typically use a mesoporous oxide scaffold that is fully infiltrated by the OTP and then topped with a planar OTP "capping" layer, which enhances light absorption, 10,11 resulting in PSCs with hysteresis-free PCE of >20%. 12There have been numerous studies on controlling the overall morphology/coverage (see, e.g., ref 13) and crystallinity (see e.g. ref 14) of OTP thin films in the different PSC embodiments and their effects on OTP properties and performance of the PSCs; however, there is paucity of detailed characteriz...

show abstract

Section: The Journal Of Physical Chemistry Lettersmentioning

confidence: 48%

mentioning

confidence: 99%

Crystal Morphologies of Organolead Trihalide in Mesoscopic/Planar Perovskite Solar Cells

Zhou

Vasiliev

et al. 2015

J. Phys. Chem. Lett.

100

102

View full text Add to dashboard Cite

show abstract

“…Therefore huge efforts have been devoted to the optimization of morphology and processing conditions, in particular by controlling the interactions of the material precursors in solution or with the substrate. [21][22][23][24][25] A further constraint factor in the spin-coated devices is that the number of layers allowed are limited by their solubility in orthogonal solvents. The fabrication of heterostructured devices may open ways to increase the number of layers allowing to decouple transport from optical characteristics, thus increasing the overall performances of the device, as already shown in small molecules based Organic LEDs (OLEDs).…”

Section: Doi: 101002/aelm201500325mentioning

confidence: 99%

Fully Vapor‐Deposited Heterostructured Light‐Emitting Diode Based on Organo‐Metal Halide Perovskite

Genco

Mariano

Carallo

et al. 2016

Adv Elect Materials

Self Cite

View full text Add to dashboard Cite

“…So far, insulating Al 2 O 3 materials have been widely used in PSCs. Different kinds of mesoporous scaffolds have an impact on final properties of perovskites and a high degree of preferential orientation has been detected for Al 2 O 3 scaffolds 12 . Moreover, the long-term stability of PSCs would be improved with a porous Al 2 O 3 buffer layer or ultrathin Al 2 O 3 layers prepared by atomic layer deposition 13, 14 .…”

Section: Introductionmentioning

confidence: 99%

Tunability of Band Gap and Photoluminescence in CH3NH3PbI3 Films by Anodized Aluminum Oxide Templates

Zhang

Wang

Ren

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Hybrid organic-inorganic halide CH3NH3PbI3 perovskite films are deposited on anodized aluminum oxide templates with the different pore diameters via one-step spin coating method. The obvious 0.082 eV blue shift of optical band gap is observed in films with decreasing the diameters of pores from 400 to 30 nm. And numerical simulations based on finite element modeling are carried out to represent the absorption edge and consistent with the experiment results. It is interesting that the films show the intense photoluminescence with the excitation intensity of less than 1 μW. Moreover, the photoluminescence intensity is increased with increasing pore diameters, which is attributed to the radiative recombination rate of photogenerated electrons and holes. These results pave a way for the further understanding of tunable photophysical properties of perovskite films.

show abstract

Effect of Mesostructured Layer upon Crystalline Properties and Device Performance on Perovskite Solar Cells

Cited by 80 publications

References 36 publications

Crystal Morphologies of Organolead Trihalide in Mesoscopic/Planar Perovskite Solar Cells

Crystal Morphologies of Organolead Trihalide in Mesoscopic/Planar Perovskite Solar Cells

Fully Vapor‐Deposited Heterostructured Light‐Emitting Diode Based on Organo‐Metal Halide Perovskite

Tunability of Band Gap and Photoluminescence in CH3NH3PbI3 Films by Anodized Aluminum Oxide Templates

Contact Info

Product

Resources

About