High-efficiency bulk heterojunction perovskite solar cell fabricated by one-step solution process using single solvent: synthesis and characterization of material and film formation mechanism

Chang, Chunyu; Wang, Chieh-Ping; Raja, Rathinam; Wang, Leeyih; Tsao, Cheng‐Si; Su, Wei‐Fang

doi:10.1039/c7ta07939g

Cited by 31 publications

(27 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface energy of all samples was reduced overall with a small increase in the polar component, suggesting some interaction of moisture with the BHJ. [ 75,76 ] All the samples presented higher RMS values upon aging. Previous stability studies show that aging does not affect the packing and face‐on orientation, however it promotes a higher stacking and crystallization of IEICO‐4F, [ 50 ] which correlates with the presented topography.…”

Section: Resultsmentioning

confidence: 99%

Ink Engineering of Transport Layers for 9.5% Efficient All‐Printed Semitransparent Nonfullerene Solar Cells

Corzo

Bihar

Alexandre

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

New polymer donors and nonfullerene acceptors have elevated the performance and stability of solar cells to higher grounds. To achieve their full potential, they require their adaptation to scalable and cost‐effective solution manufacturing techniques for large area deposition. Likewise, formulating scalable solution‐based transport layer inks that are compatible with the photoactive layer is imperative. This manuscript reports the full integration of solution‐based transport layers and electrode alongside a PTB7‐Th:IEICO‐4F bulk heterojunction in inverted architecture through inkjet‐printing, resulting in power conversion efficiencies up to 12.4% opaque devices and 9.5% semitransparent devices with average visible transmittance values of 50.1%, including hole transport layer. The wetting envelope of the highly‐hydrophobic photoactive layer alongside the surface energy of candidate solutions and solvents allows the formulation of thick transport layer inks that are compatible with the drop‐on‐demand inkjet‐printing process and yield uniform and homogenous films. Moreover, the surface energy components of the donor and acceptor serves as a fingerprint to assess the vertical stratification of the photoactive layer with the inclusion of different solvents. This methodology addresses a scale‐up bottleneck of solution‐based transport layers for high‐efficiency organic cells, enabling its adaptation to high‐throughput techniques including slot‐die and roll‐to‐roll coating.

show abstract

Section: Resultsmentioning

confidence: 99%

Ink Engineering of Transport Layers for 9.5% Efficient All‐Printed Semitransparent Nonfullerene Solar Cells

Corzo

Bihar

Alexandre

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…Films with surface fractals possess 2D self-similar morphology on different scales from nanometers to micrometers, which implies that the film contains densely packed perovskite grains. 59 The changes in α and the fractal dimension D s = 6 – α can tell us about the transformations on the surface roughness during the different phases of nucleation. An increase in D s indicates that the surface roughness becomes larger.…”

Section: Resultsmentioning

confidence: 99%

Influence of Additives on the In Situ Crystallization Dynamics of Methyl Ammonium Lead Halide Perovskites

Alhazmi

Ebbens

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Understanding the kinetics of the crystallization process for organometal halide perovskite formation is critical in determining the crystalline, nanoscale morphology and therefore the electronic properties of the films produced during thin film formation from solution. In this work, in situ grazing incidence small-angle X-ray scattering (GISAXS) and optical microscopy measurements are used to investigate the processes of nucleation and growth of pristine mixed halide perovskite (MAPbI 3– x Cl x ) crystalline films deposited by bar coating at 60 °C, with and without additives in the solution. A small amount of 1,8-diiodooctane (DIO) and hydriodic acid (HI) added to MAPbI 3– x Cl x is shown to increase the numbers of nucleation centers promoting heterogeneous nucleation and accelerate and modify the size of nuclei during nucleation and growth. A generalized formation mechanism is derived from the overlapping parameters obtained from real-time GISAXS and optical microscopy, which revealed that during nucleation, perovskite precursors cluster before becoming the nuclei that function as elemental units for subsequent formation of perovskite crystals. Additive-free MAPbI 3– x Cl x follows reaction-controlled growth, in contrast with when DIO and HI are present, and it is highly possible that the growth then follows a hindered diffusion-controlled mechanism. These results provide important details of the crystallization mechanisms occurring and will help to develop greater control over perovskite films produced.

show abstract

“…The fluorinated PCBM has shown to reduce the surface defects and to enhance the current density of PSC. The bulk heterojunction device with fluorinated PCBM has achieved a PCE of 16.2% with long-term stability (Supplementary Figure 2B) (Chang et al, 2018).…”

Section: Fullerene Compounds Electron Extraction Layermentioning

confidence: 99%

High-Performance Perovskite Solar Cells Based on Low-Temperature Processed Electron Extraction Layer

Chan

Chang

2019

Front. Mater.

View full text Add to dashboard Cite

Organic-inorganic perovskite solar cells (PSCs) is considered one of the most promising energy harvesting technologies due to its high power conversion efficiency (PCE). The T. Miyasaka group first reported the methylammonium lead halide (CH 3 NH 3 PbX 3) as a light absorber of dye-sensitized solar cells with a PCE of 3.8% in 2009. Over the past decade, many research groups have been dedicated to constructing high-performance PSCs and have obtained fantastic progress. Before commercialization, many issues have to be overcome. To extend the application of PSCs, flexible PSCs are seen as the preferred choice. However, the conventional process requires high-temperature procedures that are incompatible with the production of flexible PSCs. Here, we specifically focus on the recent developments of the low-temperature process strategies for fabricating high-performance PSCs. This mini-review briefly discusses the development in low-temperature processed metal oxide and carbon-based electron extraction layer (EEL). The approaches for low-temperature solution-processed PSCs are introduced and then the various PSCs with distinctive EEL are discussed. Overall, this minireview contributes to a better understanding of the low-temperature processed electron extraction layer. Strategies and perspectives are also provided for further high-performance PSCs.

show abstract

High-efficiency bulk heterojunction perovskite solar cell fabricated by one-step solution process using single solvent: synthesis and characterization of material and film formation mechanism

Abstract: Fluorinated PC61BM can be used to fabricate BHJ perovskite films in one step using one solvent in a BHJ precursor solution system.

Cited by 31 publications

References 32 publications

Ink Engineering of Transport Layers for 9.5% Efficient All‐Printed Semitransparent Nonfullerene Solar Cells

Ink Engineering of Transport Layers for 9.5% Efficient All‐Printed Semitransparent Nonfullerene Solar Cells

Influence of Additives on the In Situ Crystallization Dynamics of Methyl Ammonium Lead Halide Perovskites

High-Performance Perovskite Solar Cells Based on Low-Temperature Processed Electron Extraction Layer

Contact Info

Product

Resources

About