Photovoltaic mixed-cation lead mixed-halide perovskites: links between crystallinity, photo-stability and electronic properties

Rehman, Waqaas; McMeekin, David P.; Patel, Jay B.; Milot, Rebecca L.; Johnston, Michael B.; Snaith, Henry J.; Herz, Laura M.

doi:10.1039/c6ee03014a

Cited by 535 publications

(687 citation statements)

References 63 publications

Supporting

Mentioning

655

Contrasting

Order By: Relevance

“…[4] Although very stable devices were reported, introducing several cations and halide anions could open the way for more degradation and demixing pathways. Once one of the cations or halides segregates, it could also influence the stability of the rest of the perovskite, [269] making stability studies on these materials very complex. Therefore, further studies regarding the thermodynamic stability and possible degradation mechanisms of these multication, mixed-halide perovskites are essential for long-term stability and potential commercialization of these complex perovskites.…”

Section: Mixed-halide Mixed-cation Perovskitesmentioning

confidence: 99%

“…[248,269] These perovskites with a caesium content between 0.10 < y < 0.30 show a high crystallinity and good optoelectronic properties, and are especially interesting for tandem applications. Upon the addition of a third cation to these mixtures (Cs/MA/FA), both highly efficient solar cells and good long-term stability under continuous illumination were demonstrated.…”

Section: Mixed-halide Mixed-cation Perovskitesmentioning

confidence: 99%

See 1 more Smart Citation

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

Petrus

Schlipf

Cheng

et al. 2017

Advanced Energy Materials

317

201

View full text Add to dashboard Cite

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...

show abstract

Section: Mixed-halide Mixed-cation Perovskitesmentioning

confidence: 99%

Section: Mixed-halide Mixed-cation Perovskitesmentioning

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

317

201

View full text Add to dashboard Cite

show abstract

“…Phase segregation of mixed perovskites has been reported to be detrimental for both device performance and stability. [34,36,39,66] The full width half maximum (FWHM) values of the PL peaks were extracted to show the phase purity on various mixed perovskite samples ( Figure S6, Supporting Information).…”

Section: Preparation Of the Mixed Csmentioning

confidence: 99%

“…[36][37][38] Following this work, partial substitution of Cs + has also been demonstrated in other systems, for example, Cs x FA 1−x PbI y Br 3−y , FA x MA y Cs 1−x−y PbI z Br 3−z , to improve PCE and stability. [39][40][41] Excellent device stability has been demonstrated on Cs x FA 1−x PbI y Br 3−y , which is the first reported perovskite passing the International Electrotechnical Commission (IEC) 61215 damp heat test (less than 10% PCE decay at 85 °C and 85% relative humidity for 1000 h), a standard accelerating lifetime testing protocol for crystalline silicon terrestrial photovoltaic modules. [42] The Cs-substituted mixed cation perovskites create a new avenue for development of PSCs with a high potential in solving the intrinsic stability issue.…”

Section: Introductionmentioning

confidence: 99%

Combination of Hybrid CVD and Cation Exchange for Upscaling Cs‐Substituted Mixed Cation Perovskite Solar Cells with High Efficiency and Stability

Jiang

Leyden

Qiu

et al. 2017

Adv Funct Materials

173

178

View full text Add to dashboard Cite

Mixed cation hybrid perovskites such as Cs [16][17][18] and adjusting the composition of perovskite films, [19][20][21][22] research efforts are also urgently needed to increase the scalability of research findings obtained in research labs and make this technology amenable for industry. There are two main challenges we are still facing.(I) The first is the stability challenge. At present stability of PSCs is still poorer than inorganic semiconductor based solar cells, foe example, crystalline silicon solar cells and thin film copper indium gallium selenide (CIGS) solar cells. [10,[23][24][25] To overcome the instability issue, external protections (e.g., perovskite surface functionalization, [26] utilization of chemically inert electron transport materials, hole transport materials and top electrode, deposition of additional protection layer, etc.) have been attempted. [27][28][29] Stability of the perovskite layer itself is Large-Area Perovskite Solar Modules

show abstract

“…The B and C coefficients become larger in MAPbBr 3 , and this has been also confirmed in mixed halide perovskites MAPb(I 1¹x Br x ) 3 . 105,106 …”

mentioning

confidence: 99%

Free Carrier Radiative Recombination and Photon Recycling in Lead Halide Perovskite Solar Cell Materials

Yamada

Kanemitsu

2017

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

Organic-inorganic hybrid lead halide perovskites are currently a most attractive class of materials since they have emerged as a solar cell material that realizes both high efficiency and simple low-cost fabrication. The power conversion efficiencies of perovskite solar cells now exceed 22%, which is comparable to that of commercially available CIGS and CdTe thin film solar cells. The key to further improvement is understanding the physical origin of the high efficiency of the perovskite solar cells, and a tremendous effort to come closer to this target has been made through numerous experiments.In this review article, we discuss the optoelectronic properties of perovskite CH 3 NH 3 PbX 3 (X = I and Br) solar cell materials. Special attention is given to the free carrier recombination and photon recycling (the re-absorption of photons emitted by radiative recombination of photocarriers) processes in CH 3 NH 3 PbX 3 single crystals, because a deep understanding of these processes is crucial for improving the solar cell performance. Lead halide perovskites show unique optical properties, e.g., extremely high quantum efficiency of luminescence, small Urbach tail in the absorption spectra, and long lifetime of photocarriers, which all suggest a low density of

show abstract

Photovoltaic mixed-cation lead mixed-halide perovskites: links between crystallinity, photo-stability and electronic properties

Abstract: We establish compositional effects on stability, crystallinity, charge-carrier life times and mobilities in mixed-cation lead iodide-bromide perovskites as band gap tunable materials for multi-junction photovoltaic cells.

Cited by 535 publications

References 63 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

Combination of Hybrid CVD and Cation Exchange for Upscaling Cs‐Substituted Mixed Cation Perovskite Solar Cells with High Efficiency and Stability

Free Carrier Radiative Recombination and Photon Recycling in Lead Halide Perovskite Solar Cell Materials

Contact Info

Product

Resources

About