Unbroken Perovskite: Interplay of Morphology, Electro‐optical Properties, and Ionic Movement

Correa‐Baena, Juan‐Pablo; Anaya, Miguel; Lozano, Gabriel; Tress, Wolfgang; Domanski, Konrad; Saliba, Michael; Matsui, Taisuke; Jacobsson, T. Jesper; Calvo, Mauricio E.; Abate, Antonio; Grätzel, Michaël; Míguez, Hernán; Hagfeldt, Anders

doi:10.1002/adma.201600624

Cited by 256 publications

(260 citation statements)

References 29 publications

(38 reference statements)

Supporting

Mentioning

238

Contrasting

Unclassified

Order By: Relevance

“…Therefore, after a certain point, the efficiency decreases with the increasing thickness. This result is similar to the experimental result found by Correa-Baena [13]. With the increasing thickness, the recombination expedites.…”

Section: Effect Of Thickness Of the Ch 3 Nh 3 Sni 3 Layersupporting

confidence: 82%

Effect of Different HTM Layers and Electrical Parameters on ZnO Nanorod-Based Lead-Free Perovskite Solar Cell for High-Efficiency Performance

Anwar

Mahbub

Satter

et al. 2017

International Journal of Photoenergy

185

View full text Add to dashboard Cite

Simulation has been done using SCAPS-1D to examine the efficiency of CH 3 NH 3 SnI 3 -based solar cells including various HTM layers such as spiro-OMeTAD, Cu 2 O, and CuSCN. ZnO nanorod array has been considered as an ETM layer. Device parameters such as thickness of the CH 3 NH 3 SnI 3 layer, defect density of interfaces, density of states, and metal work function were studied. For optimum parameters of all three structures, efficiency of 20.21%, 20.23%, and 18.34% has been achieved for spiro-OMeTAD, Cu 2 O, and CuSCN, respectively. From the simulations, an alternative lead-free perovskite solar cell is introduced with the CH 3 NH 3 SnI 3 absorber layer, ZnO nanorod ETM layer, and Cu 2 O HTM layer.

show abstract

Section: Effect Of Thickness Of the Ch 3 Nh 3 Sni 3 Layersupporting

confidence: 82%

Effect of Different HTM Layers and Electrical Parameters on ZnO Nanorod-Based Lead-Free Perovskite Solar Cell for High-Efficiency Performance

Anwar

Mahbub

Satter

et al. 2017

International Journal of Photoenergy

185

View full text Add to dashboard Cite

show abstract

“…Scanning electron microscopy (SEM) was used to investigate the grain size and the surface morphology, which are known to influence the device performance. 31,32,33 The top-view SEM image of exhibit very similar performance in contrast to our pioneering report in which MAPbI 3 (m) gave superior device performance. 28 Moreover, the photovoltaic parameters in forward scan are the most affected in these two devices, while there is an insignificant difference observed in backward scan (Figure 2a).…”

mentioning

confidence: 79%

Reduction in the Interfacial Trap Density of Mechanochemically Synthesized MAPbI₃

Prochowicz

Yadav

Saliba

et al. 2017

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Organo-lead halide perovskites have emerged as a promising light harvesting materials for solar cells.The ability to prepare high quality films with a low concentration of defects is essential for obtaining high device performance. Here, we advance the procedure for the fabrication of efficient perovskite solar cells (PSCs) based on mechanochemically synthesized MAPbI 3 . The use of mechano-perovskite for the thin film formation provides a high degree of control of the stoichiometry and allows for the growth of relatively large crystalline grains. The best device achieved a maximum PCE of 17.5% from a current-voltage scan (J-V), which stabilized at 16.8% after 60 sec of maximum power point tracking.Strikingly, PSCs based on MAPbI 3 mechanoperovskite exhibit lower "hysteretic" behaviour in comparison to that comprising MAPbI 3 obtained from the conventional solvothermal reaction between PbI 2 and MAI. To gain a better understanding of the difference in J-V hysteresis we analyze the charge/ion accumulation mechanism and identify the defect energy distribution in the resulting MAPbI 3 based devices. These results indicate that the use of mechanochemically synthesized perovskites provides a promising strategy for the formation of crystalline film demonstrating slow charge recombination and low trap density.

show abstract

“…Intensity modulated photocurrent spectroscopy was performed using Autolab PGSTAT302N according to procedures previously reported. 65 …”

Section: Methods Sectionmentioning

confidence: 99%

Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cells

Domanski

Roose

Matsui

et al. 2017

Energy Environ. Sci.

Self Cite

545

576

View full text Add to dashboard Cite

Perovskites have been demonstrated in solar cells with power conversion efficiency well above 20%, which makes them one of the strongest contenders for the next generation photovoltaics. While there are no concerns about their efficiency, very little is known about their stability under illumination and load. Ionic defects and their migration in the perovskite crystal lattice are one of the most alarming sources of degradation, which can potentially prevent the commercialization of perovskite solar cells (PSCs). In this work, we provide direct evidence of electric field-induced ionic defect migration and we isolate their effect on the long-term performance of state-of-the-art devices. Supported by modelling, we demonstrate that ionic defects, migrating on timescales significantly longer (above 10 3 s) than what has so far been explored (from 10 -1 to 10 2 s), abate the initial efficiency by 10-15% after several hours of operation at the maximum power point. Though these losses are not negligible, we prove that the initial efficiency is fully recovered when leaving the device in the dark for a comparable amount of time. We verified this behaviour over several cycles resembling day/night phases, thus probing the stability of PSCs under native working conditions. This unusual behaviour reveals, that research and industrial standards currently in use to assess the performance and the stability of solar cells need to be adjusted for PSCs.Our work paves the way towards much needed new testing protocols and figures of merit specifically designed for PSCs.4

show abstract

Unbroken Perovskite: Interplay of Morphology, Electro‐optical Properties, and Ionic Movement

Cited by 256 publications

References 29 publications

Effect of Different HTM Layers and Electrical Parameters on ZnO Nanorod-Based Lead-Free Perovskite Solar Cell for High-Efficiency Performance

Effect of Different HTM Layers and Electrical Parameters on ZnO Nanorod-Based Lead-Free Perovskite Solar Cell for High-Efficiency Performance

Reduction in the Interfacial Trap Density of Mechanochemically Synthesized MAPbI₃

Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cells

Contact Info

Product

Resources

About

Unbroken Perovskite: Interplay of Morphology, Electro‐optical Properties, and Ionic Movement

Cited by 256 publications

References 29 publications

Effect of Different HTM Layers and Electrical Parameters on ZnO Nanorod-Based Lead-Free Perovskite Solar Cell for High-Efficiency Performance

Effect of Different HTM Layers and Electrical Parameters on ZnO Nanorod-Based Lead-Free Perovskite Solar Cell for High-Efficiency Performance

Reduction in the Interfacial Trap Density of Mechanochemically Synthesized MAPbI3

Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cells

Contact Info

Product

Resources

About

Reduction in the Interfacial Trap Density of Mechanochemically Synthesized MAPbI₃