Electronic structure and photovoltaic application of BiI3

Lehner, Anna J.; Wang, Hengbin; Fabini, Douglas H.; Liman, Christopher D.; Hébert, Claire-Alice; Perry, Erin E.; Wang, Ming; Bazan, Guillermo C.; Chabinyc, Michael L.; Seshadri, Ram

doi:10.1063/1.4932129

Cited by 136 publications

(184 citation statements)

References 40 publications

Supporting

Mentioning

171

Contrasting

Order By: Relevance

“…In this method, the intersection of the leading edge with the background level determines the position of the band offset. 19,22,27,30,163 However, this approximation can lead to erroneous fits in the case of band edges that are not abrupt. In particular, inaccuracies may arise from this method if the density of states at the leading edge is low and there is no distinct tangent to take, as occurs for many PIMs reported.…”

Section: Fitting the Leading Edge In Photoemission Spectroscopy Measumentioning

confidence: 99%

“…These include the valence and conduction band onsets with respect to the Fermi level, as well as the vacuum level position. 19,27,162 Photoemission spectroscopy is a powerful tool to investigate the band structure of novel semiconductor materials and the position of the Fermi level in the bandgap. The techniques are applicable not only to thin films, 163 but also single crystals, for which band positions need to be precisely known for electrical characterization and device applications.…”

Section: Atom Probe Tomography (Apt)mentioning

confidence: 99%

“…In particular, inaccuracies may arise from this method if the density of states at the leading edge is low and there is no distinct tangent to take, as occurs for many PIMs reported. 19,27,30,163 A method to visualize gap states is to plot the leading edge on a semilogarithmic scale, since band tails can be described by exponential functions. 172,173 This is illustrated in Figure 6a for organic small molecules.…”

Section: Fitting the Leading Edge In Photoemission Spectroscopy Measumentioning

confidence: 99%

“…17 Many of these PIMs have recently been explored for photovoltaic applications. These include BiI 3 , 19,20 (CH 3 NH 3 ) 3 Bi 2 I 9 , [21][22][23][24] BiSI, 25,26 BiSeI, 25,26 K 3 Bi 2 I 9 , 27 Rb 3 Bi 2 I 9 , 27 Cs 3 Bi 2 I 9 , 27 BiOI, 28,29 Cs 3 Sb 2 I 9 , 30 SbSI, 31 SbSeI, 31 Sb 2 Se 3 , 32 CuSbSe 2 , 33,34 (CH 3 NH 3 ) 2 KBiCl 6 , 35 and SnS. 36 Many other recent works have been written on understanding the properties of hybrid lead-halide perovskites that make them excellent solar absorbers, e.g., energetic carrier screening via polarons, which may lead to new design rules.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Perovskite-Inspired Photovoltaic Materials: Toward Best Practices in Materials Characterization and Calculations

et al. 2017

View full text Add to dashboard Cite

ABSTRACT:Recently, there has been an explosive growth in research based on hybrid lead-halide perovskites for photovoltaics owing to rapid improvements in efficiency. The advent of these materials for solar applications has led to widespread interest in understanding the key enabling properties of these materials. This has resulted in renewed interest in related compounds and a search for materials that may replicate the defect-tolerant properties and long lifetimes of the hybrid lead-halide perovskites. Given the rapid pace of development of the field, the rises in efficiencies of these systems have outpaced the more basic understanding of these materials. Measuring or calculating the basic properties, such as crystal/electronic structure and composition, can be challenging because some of these materials have anisotropic structures, and/or are composed of both heavy metal cations and volatile, mobile, light elements. Some consequences are beam damage during characterization, composition change under vacuum, or compound effects, such as the alteration of the electronic structure through the influence of the substrate. These effects make it challenging to understand the basic properties integral to optoelectronic operation. Compounding these difficulties is the rapid pace with which the field progresses. This has created an ongoing need to continually evaluate best practices with respect to characterization and calculations, as well as to identify inconsistencies in reported values to determine if those inconsistencies are rooted in characterization methodology or materials synthesis. This article describes the difficulties in characterizing hybrid lead-halide perovskites and new materials, and how these challenges may be overcome. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 challenges discussed. The focus in this article is on crystallography, composition measurements, photoemission spectroscopy and calculations on perovskites and new, related absorbers. We suggest how some of the important artifacts could be avoided and how the reporting for each technique could be streamlined between groups to ensure reproducibility as the field progresses.

show abstract

Section: Fitting the Leading Edge In Photoemission Spectroscopy Measumentioning

confidence: 99%

Section: Atom Probe Tomography (Apt)mentioning

confidence: 99%

Section: Fitting the Leading Edge In Photoemission Spectroscopy Measumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Perovskite-Inspired Photovoltaic Materials: Toward Best Practices in Materials Characterization and Calculations

et al. 2017

View full text Add to dashboard Cite

show abstract

“…As an alternative, researchers have looked into the possibility of incorporating bismuth instead, which forms air-stable structures. [274][275][276] However, preparing high-quality films has been challenging for these materials, and therefore the resulting device performance is still lower than for their lead-and tin-based counterparts. Recently, silver/bismuth-based elpasolites (more commonly known as double perovskites) with the general formula A 2 AgBiX 6 , (A = MA, FA or Cs; X = Cl, Br, I, Figure 16) have been suggested as a promising lead-free and air-stable alternative.…”

Section: Sustainabilitymentioning

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

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