Hysteresis-less inverted CH3NH3PbI3 planar perovskite hybrid solar cells with 18.1% power conversion efficiency

Heo, Jin Hyuck; Han, Hyo Kyung; Kim, Dasom; Ahn, Tae Kyu; Im, Sang Hyuk

doi:10.1039/c5ee00120j

Cited by 1,124 publications

(640 citation statements)

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“…2d) 31 ; it has been shown that cells with fullerene organic n-type charge collection layers exhibit negligible hysteresis in their J-V curves 32 . We interpret this to indicate that a large surface defect density is generated at the interface between the perovskite and compact TiO2, likely during perovskite crystallisation, whereas the organic materials appear not to induce such a high density of defects 32 .…”

Section: Photovoltaics (Pvs)mentioning

confidence: 99%

Metal halide perovskites for energy applications

2016

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Exploring prospective materials for energy production and storage is one of the biggest challenges in this century. Solar energy is arguably the most important amongst various renewable energy resources, due to its wide availability and sustainability with lowest environmental impact. Metal halide perovskites have emerged as a class of semiconductor materials with unique properties including tuneable band gap, high absorption coefficient, broad absorption spectrum, high charge carrier mobility and long charge diffusion lengths, which enable a broad range of photovoltaic and optoelectronic applications. Since the first embodiment of perovskite solar cells showing a power conversion efficiency of 3.8%, the device performance has now been boosted up to a certified 21% within a few years. In this perspective, we summarize differing forms of perovskite materials produced via various deposition procedures, focusing on their energy related applications, and discuss current challenges and possible solutions, with the aim of stimulating potential new applications.

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Section: Photovoltaics (Pvs)mentioning

confidence: 99%

Metal halide perovskites for energy applications

2016

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“…Noel et al [153] and Dane et al [154] used Lewis bases such as pyridine to treat the perovskite films in order to reduce recombination centers, enhancing the photoluminescence intensity and lifetime. In addition, it has been widely observed that [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) molecules, [155,156] either as an interlayer or mixed as bulk heterojunction structure, are able to passivate defects and alleviate or even eliminate hysteresis. [76] Although the defect passivation process significantly enhances the device performance and decreases the hysteresis, it is found that the time interval for charge trapping and detrapping ranges within milliseconds, [157] or even nanoseconds, [158] which is much shorter than the typical time for the hysteretic behavior.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Capturing the Sun: A Review of the Challenges and Perspectives of Perovskite Solar Cells

Petrus

Schlipf

Cheng

et al. 2017

Advanced Energy Materials

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following statement: These materials can be processed from solution and yet exhibit optoelectronic materials properties described in classic solid-state physics textbooks. This unprecedented combination has led to photovoltaic devices that can be processed at room temperature and achieve performance levels similar to industry giant polycrystalline silicon, from a starting point of 3.8% in 2009. [1][2][3][4] The first light-emitting electrochemical cells [5] and diodes [6][7][8] have also been introduced recently, leading to tunable light emission spectra and internal quantum efficiencies exceeding 15%.The road towards these achievements has been marked by a constant improvement of perovskite deposition techniques fueled by our increasing understanding of the crystallization processes. The choice of deposition technique, either from solution or vapor, and the composition and order in which precursor species are applied has a great influence on the crystallization kinetics. Here, one can distinguish one-step methods where the perovskite is formed from a precursor mixture dissolved in a common solution, and two-step methods where the inorganic compound is deposited first and transformed to the perovskite phase later by addition of the organic constituents. [9][10][11] Furthermore, many parameters during processing can have an effect on the crystallization mechanism and consequently on film morphology, such as the choice of solvents, concentrations and processing additives that are often not incorporated into the final product. [11][12][13] We discuss this aspect in Section 2, where we focus our attention on the most commonly employed solution-based techniques. Additionally, as for any new technology trying to displace an incumbent technology, higher efficiencies, lower costs, reproducibility, stability, and sustainability are paramount. In particular, reproducibility has been a major challenge in perovskite solar cells from the beginning: small variations in morphology, like crystal size, film roughness, and pinholes can have detrimental effects on photovoltaic performance. [14] On the other hand, current-voltage measurements often showed a hysteresis that is rarely seen in other photovoltaic technologies. [15] These topics are highlighted in Sections 3 and 4. Finally, in Section 5 we discuss the framework for market introduction, such as cost reduction by choosing low-cost charge transport layers, or how the lifetime of perovskite absorbers can be extended by the choice of materials composition.Hybrid metal halide perovskites have become one of the hottest topics in optoelectronic materials research in recent years. Not only have they surpassed everyone's expectations and achieved similar performance as tried and true polycrystalline silicon photovoltaic devices, but they are also finding applications in a variety of different fields, including lighting. The main advantages of hybrid metal halide perovskites are simple processability, compatible with large-scale solution processing such as roll-to-roll printing, a...

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“…Spin coating ensures flexibility in adopting either the one step process (i.e., using one ink made of a mixture of the two precursors) or the sequential step deposition (e.g., lead iodide first and then methylammonium iodide) for forming polycrystalline perovskite films. 22 Heo et al, 23 fabricated an inverted planar-structured 23 Although efficiencies achieved with spin coating have been high, ensuring good levels of reproducibility and thickness and morphology control, the sizes of the module have been relatively small and the technique does not really represent an effective solution for the scale up of perovskite solar cell manufacturing. A large percentage of the ink volume is wasted during the spin coating process, leading to a substantial increase in costs and exposure to potentially harmful chemicals.…”

Section: Spin Coatingmentioning

confidence: 99%

Research Update: Large-area deposition, coating, printing, and processing techniques for the upscaling of perovskite solar cell technology

et al. 2016

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To bring perovskite solar cells to the industrial world, performance must be maintained at the photovoltaic module scale. Here we present large-area manufacturing and processing options applicable to large-area cells and modules. Printing and coating techniques, such as blade coating, slot-die coating, spray coating, screen printing, inkjet printing, and gravure printing (as alternatives to spin coating), as well as vacuum or vapor based deposition and laser patterning techniques are being developed for an effective scale-up of the technology. The latter also enables the manufacture of solar modules on flexible substrates, an option beneficial for many applications and for roll-to-roll production.

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Hysteresis-less inverted CH₃NH₃PbI₃ planar perovskite hybrid solar cells with 18.1% power conversion efficiency

Abstract: The inverted CH3NH3PbI3 planar hybrid solar cells exhibited better device efficiency and stability and lower hysteresis than the normal cells.

Cited by 1,124 publications

References 37 publications

Metal halide perovskites for energy applications

Metal halide perovskites for energy applications

Capturing the Sun: A Review of the Challenges and Perspectives of Perovskite Solar Cells

Research Update: Large-area deposition, coating, printing, and processing techniques for the upscaling of perovskite solar cell technology

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