Hybrid Perovskite/Perovskite Heterojunction Solar Cells

Hu, Yinghong; Schlipf, Johannes; Wussler, Michael; Petrus, Michiel L.; Jaegermann, Wolfram; Bein, Thomas; Müller‐Buschbaum, Peter; Docampo, Pablo

doi:10.1021/acsnano.6b01535

Cited by 296 publications

(318 citation statements)

References 51 publications

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“…[78] A recent study, therefore, combined these 2D perovskites with 3D perovskites in a sandwich approach, by converting the upmost layer of their more efficient 3D counterparts into lower-dimensional species, to form a multifunctional heterojunction, which exhibited a higher open-circuit voltage and PCE, and longer stability in a humid atmosphere. [79] The reverse approach, converting a 2D perovskite into a three-dimensional form by interdiffusion of simple MA + cations, also showed very promising results. [80] Currently, the highest efficiencies of lower dimensional perovskites have been claimed by Tsai et al using a hot-casting method.…”

Section: Alternatives To Solution-processed Thin Filmsmentioning

confidence: 99%

“…An example was shown by Hu et al, who employed moisture-resistant layered perovskite (LPK) structures (Figure 14a). [79] Here, they demonstrated a perovskite/ perovskite heterojunction solar cell obtained via a facile solution-based cation infiltration process, to deposit layered perovskite structures onto methylammonium lead iodide (MAPbI 3 ) films. This led to an enhancement of the open-circuit voltage and power conversion efficiency due to reduced recombination losses, as well as improved moisture stability in the resulting Adv.…”

Section: Moisturementioning

confidence: 99%

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

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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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Section: Alternatives To Solution-processed Thin Filmsmentioning

confidence: 99%

Section: Moisturementioning

confidence: 99%

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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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“…(PEA) 2 (MA) n −1 Pb n I 3 n +1 , (BA) 2 (MA) n –1 Pb n I 3 n +1 , and other 2D layer‐structured OIHPs have been intensively investigated and applied to photovoltaic fields with promising PCEs 8, 107, 108, 109, 110, 111, 112, 113, 114. A p‐type (C 6 H 9 C 2 H 4 NH 3 ) 2 PbI 4 perovskite was studied to reveal the photophysics behind this van der Waals structure, and the Wannier–Mott excitons were suggested to strongly contribute to the I light despite their greater binding energy ( E b ) at room temperature 115.…”

Section: Oihps‐based Pdsmentioning

confidence: 99%

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

2017

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Recent years have witnessed skyrocketing research achievements in organic–inorganic hybrid lead halide perovskites (OIHPs) in the photovoltaic field. In addition to photovoltaics, more and more studies have focused on OIHPs‐based photodetectors in the past two years, due to the remarkable optoelectronic properties of OIHPs. This article summarizes the latest progress in this research field. To begin with, the factors influencing the performance of photodetectors are discussed, including both internal and external factors. In particular, the channel width and the incident power intensities should be taken into account to precisely and objectively evaluate and compare the output performance of different photodetectors. Next, photodetectors fabricated on single‐component perovskites in terms of different micromorphologies are discussed, namely, 3D thin‐film and single crystalline, 2D nanoplates, 1D nanowires, and 0D nanocrystals, respectively. Then, bilayer structured perovskite‐based photodetectors incorporating inorganic and organic semiconductors are discussed to improve the optoelectronic performance of their pristine counterparts. Additionally, flexible OIHPs‐based photodetectors are highlighted. Finally, a brief conclusion and outlook is given on the progress and challenges in the field of perovskites‐based photodetectors.

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“…By depositing a lower dimensional PVSK layer on top of 3D MAPbI 3 , an enhancement of the V oc and PCE was observed by Hu and co-workers. [109] Although 2D PVSK show promising properties in photovoltaics, especially the superior ambient stability, there are a few challenges for this class of materials to be employed as light absorbers. As mentioned above, these 2D PVSK possess moderate interlayer charge transport properties, which hampers the photovoltaic performance in the resulted devices.…”

Section: D Pvskmentioning

confidence: 99%

The Emergence of the Mixed Perovskites and Their Applications as Solar Cells

Xiao

Liü

Zhang

et al. 2017

Advanced Energy Materials

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The halide perovskite (PVSK) materials (with ABX3 formulation) have emerged as “dream materials” for photovoltaic (PV) applications due to their remarkable physical properties such as high optical absorption coefficient, carrier mobility, long carrier diffusion lengths, etc. These properties have enabled the PV devices to reach higher than 20% power conversion efficiencies (PCE) in record time. The further pursuit of higher PCE and improved stability brings forth increasing interests in so‐called “mixed composition” PVSK materials, consisting of partial substitution of the A, B, and/or X‐sites with alternative elements/molecules of similar size. Herein, we highlight the recent advances in developing mixed PVSK for PVs and their relevant optoelectronic properties. We mainly focus on mixed PVSK materials in the form of polycrystalline thin films, but also discuss nanostructured and two‐dimensional (2D) PVSK materials due to the increasing interest of broad readership. Efforts are exerted to elucidate the design principles of mixed PVSK and fabrication techniques for high performance optoelectronic devices, which help deepen our fundamental understanding of mixed PVSK systems. We hope this review will shed light onto the design and synthesis of mixed PVSK materials to further the progress of PVSK photovoltaics towards higher efficiencies and longer lifetimes.

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Hybrid Perovskite/Perovskite Heterojunction Solar Cells

Cited by 296 publications

References 51 publications

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

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

Photodetectors Based on Organic–Inorganic Hybrid Lead Halide Perovskites

The Emergence of the Mixed Perovskites and Their Applications as Solar Cells

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