Steering the crystallization of perovskites for high-performance solar cells in ambient air

Wang, Feng; Zhang, Ting; Wang, Yafei; Liu, Detao; Zhang, Peng; Chen, Hao; Ji, Long; Chen, Li; Chen, Zhi David; Wu, Jiang; Liu, Xin; Li, Yanbo

doi:10.1039/c9ta02566a

Cited by 67 publications

(48 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1e, the decorated CsPbBr 3 QDs can only enhance the absorption for a narrow range (400-500 nm) in comparison with CH 3 NH 3 PbI 3 −x Cl x layer solely. Furthermore, we also calculated the bandgap of QDs according to the Tauc equation [39][40][41][42][43][44] as shown in Additional file 1: Figure S1. The bandgap is about 2.38 eV.…”

Section: Resultsmentioning

confidence: 99%

All-Perovskite Photodetector with Fast Response

et al. 2019

View full text Add to dashboard Cite

Perovskites have attracted substantial attention on account of their excellent physical properties and simple preparation process. Here we demonstrated an improved photodetector based on solution-processing organic-inorganic hybrid perovskite CH 3 NH 3 PbI 3− x Cl x layer decorated with CsPbBr 3 perovskite quantum dots. The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 photodetector was operated in a visible light region, which appeared high responsivity ( R = 0.39 A/W), detectivity ( D* = 5.43 × 10 9 Jones), carrier mobility ( μ p = 172 cm 2 V −1 s −1 and μ n = 216 cm 2 V −1 s −1 ), and fast response (rise time 121 μs and fall time 107 μs). The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 heterostructure is anticipated to find comprehensive applications in future high-performance photoelectronic devices. Electronic supplementary material The online version of this article (10.1186/s11671-019-3082-z) contains supplementary material, which is available to authorized users.

show abstract

Section: Resultsmentioning

confidence: 99%

All-Perovskite Photodetector with Fast Response

et al. 2019

View full text Add to dashboard Cite

show abstract

“…However, a high humidity environment promotes the growth of nuclei, which results in a larger grain size with poor coverage (Figure 4b). [98] The mild humid environment of 30-50% RH was considered as the optimal condition for perovskite film fabrication. [63,96,97,99,100] For example, the perovskite films annealed at a RH of 30-40% obtained the PCE of 17.1%, but when the humidity was increased to 80%, the PCE was reduced to 12.1%.…”

Section: Ambient Exposure: One-step Spin-coatingmentioning

confidence: 99%

“…The best device of CsPbI 3 based inorganic PSCs achieved a PCE of 15.91% under 50% RH. As discussed in Section 2.2.1, Wang et al [98] reported that the atmospheric humidity can steer the crystallization process of perovskite films through affecting the evaporation of the precursor solvent. It was also found that the conventional antisolvent method, which was aimed at controlling the solvent evaporation, failed when the RH was higher than 70%, as the evaporation of solvent was strongly suppressed under high RH.…”

Section: Substrate Preheatingmentioning

confidence: 99%

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

et al. 2020

View full text Add to dashboard Cite

Unlike fossil fuels, the sun is an inexhaustible energy source that delivers more energy to the earth in 1 h than the entire planet consumes in one year. Energy can be harvested from the sun using photovoltaics (PV) and stored (e.g., batteries), meaning solar energy can be used as and when required. [3,4] Currently, the commercial PV market is dominated by single-junction crystalline silicon (c-Si) PV which deliver power conversion efficiencies (PCE) of over 26% under 1 Sun illumination (AM 1.5 standard). [5,6] Despite their high efficiencies, the fabrication of c-Si PV is nontrivial and lacks electronic tunability. Furthermore, the record efficiency for c-Si PV is 26.7% [5] which is very close to the theoretical limit of 29.4%. [7] This clearly indicates that c-Si PV is a mature technology and there is limited room for improvement. [8] Over the past two decades, third-generation solar cells such as dye-sensitized solar cells, [9,10] quantum dot solar cells, [11,12] organic solar cells, [13,14] and perovskite solar cells (PSCs) [15,16] have been developed as alternatives to c-Si technologies. Of these third-generation solar cells, single-junction PSCs have generated significant attention due to their intense visible to near-infrared absorptivity, [16-18] long diffusion lengths of the charge carriers, [19,20] high efficiency, [21,22] electronic and physical tunability, [23,24] and low manufacturing costs. [25,26] After the first report by Miyasaka's group in 2009, [27] the PCE for single junction devices increased considerably from 3.8% to 25.2%, [27,28] making it the fastest advancing PV technology to date. This has uniquely placed PSCs as the frontrunner technology to potentially replace or coexist with c-Si PV. The term "perovskite" refers to a group of compounds that share the same lattice structure as calcium titanium oxide (CaTiO 3). All PV perovskite materials have the general chemical formula ABX 3 , as illustrated in Figure 1a. Organic-Inorganic hybrid PSCs are typically made using an organic/ inorganic cation (A = methylammonium (MA) CH 3 NH 3 + , formamidinium (FA) CH 3 (NH 2) 2 + , or cesium), a divalent cation (B = Pb 2+ or Sn 2+) , [29] and an anion (X = Cl − , Br − , or I −), illustrated in Figure 1b. [16,30] A is surrounded by eight lead halide octahedra (B in the center of octahedra) and forms a cubic perovskite structure. When the size of A or/and X is changed, the structure of perovskite will distort. The Goldschmidt tolerance factor (t) [31] of perovskite is an empirical index for Organic-inorganic hybrid perovskite solar cells (PSCs) have attracted significant attention in recent years due to their high-power conversion efficiency, simple fabrication, and low material cost. However, due to their high sensitivity to moisture and oxygen, high efficiency PSCs are mainly constructed in an inert environment. This has led to significant concerns associated with the long-term stability and manufacturing costs, which are some of the major limitations for the commercialization of this cutting-edge tech...

show abstract

“…The bandgap of conventional OIMHP films is at the range of 1.5-1.6 eV, and the corresponding theoretical Shockley-Queisser limit efficiency (TS-QLE) is higher than 30% [2][3][4]. However, the reported highest PCE is much lower than the TS-QLE due to the trap-assisted non-radiative recombination in the perovskite film [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH4SCN

Liu

Chen

et al. 2019

Nanoscale Res Lett

Self Cite

View full text Add to dashboard Cite

The trap-state density in perovskite films largely determines the photovoltaic performance of perovskite solar cells (PSCs). Increasing the crystal grain size in perovskite films is an effective method to reduce the trap-state density. Here, we have added NH 4 SCN into perovskite precursor solution to obtain perovskite films with an increased crystal grain size. The perovskite with increased crystal grain size shows a much lower trap-state density compared with reference perovskite films, resulting in an improved photovoltaic performance in PSCs. The champion photovoltaic device has achieved a power conversion efficiency of 19.36%. The proposed method may also impact other optoelectronic devices based on perovskite films.

show abstract

Steering the crystallization of perovskites for high-performance solar cells in ambient air

Abstract: We developed a “humidity-insensitive antisolvent method” for highly efficient PSCs by steering the crystallization of perovskite precursor films.

Cited by 67 publications

References 49 publications

All-Perovskite Photodetector with Fast Response

All-Perovskite Photodetector with Fast Response

Ambient Fabrication of Organic–Inorganic Hybrid Perovskite Solar Cells

Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH4SCN

Contact Info

Product

Resources

About