Perovskite Solar Cell Techniques and Methods

These technical notes cover applications and technical aspects of perovskite solar cells. This includes, for example, how to precisely measure perovskite solar cells and examples of perovskite solar cells measurements using FLIM Image, PL Image, Raman Image, TRPL, etc.

2D perovskite materials could hold key to develop higher efficiency solar cell.

Research led by Prof. Honhzheng Chen from Zhejiang University fabricated 2D perovskite films with high efficiency. The fabrication of high quality film with large grains oriented grown along the direction of film thickness is of great importance for the two‐dimensional (2D) Ruddlesden‐Popper perovskite‐based solar cells (PVSCs) with high power conversion efficiency (PCE). In this work, for the first time, the team realized the fabrication of high quality 2D BA2MAn‐1PbnI3n+1 (BA+ = butylammon...

How to analyze the defects in perovskite devices and measure diode ideality factor?

Understanding the I-V characteristic of the internal structure of device is fundamental to develop a highly efficient and highly stable solar cell. When measuring I-V characteristic in a p-n diode one needs to consider the diffusion current, recombination current and series resistance effects, which could result in the device’s performance. Therefore, researchers could know whether the device is parallel to an ideal diode by calculating the ideality factor η. The ideality factor η is a numbe...

Research indicates that surface defect passivation is the key to improving the efficiency of perovskite solar cells

Scientists at the Institute of Semiconductors, CAS have found that the surface defect passivation is the key to improving the efficiency of perovskite solar cells.The research, published in the journal Nature Photonics, was led by Prof. Jingbi You, and set a new record efficiency for perovskite films of 23.32%. To further increase the PCE of PSCs, improvement of the open-circuit voltage (Voc) and fill factor (FF) could be more feasible than the short-circuit current (Jsc), considering that the...

Embrace the defects of perovskite, which leads the innovative transformation in solar cells

The future of perovskites breathtaking. Recently material scientist from North China Electric Power University developed the new planer p-n homojunction perovskite solar cells with highly efficiency of 21.3%. The research led by Prof. Meicheng Li was published in Nature Energy, and the same time, Ji-Sang Park, Shooter International Fellow in Royal Society and Aron Walsh, Department of Materials, Imperial College London, have commented that the finding open the way for perovskite solar cells. P...

Strain engineering, a new way to break through the efficiency of perovskite

Prof. Qi Chen, Beijing Institute of Technology, and Prof. Huanping Zhou, Peking University, and Prof. Lijun Zhang, Jilin University, and other materials scientists have developed the high efficiency perovskite films with 20.7 % PCEs, which is certified by NIM, China, by modulating the status of residual strains in controllable manner via rational strain engineering. The mixed halide perovskites have emerged as outstanding light absorbers for efficient solar cells. But it reveals inhomogeneity i...

2D-Quasi-2D-3D Hierarchy Structure for Tin Perovskite Solar Cells with Enhanced Efficiency (9.41%) and Stability

A team led by Prof. Zhijun Ning, the School of Physical Science and Technology at ShanghaiTech University, fabricated a Sn-based hierarchy structure perovskite in a one-step process, comprising highly parallel-orientation 2D PEA2Snl4 on the surface of 3D FASnl3. The hierarchy structure delivers significant enhanced stability and oxidation resistance in air atmosphere. They have developed a Sn-based perovskite films in planar structure solar cells and achieved a PCE up to 9.41 %. The final paper:...

Perovskite-based LEDs are making rapid progress! EQE up to 20.1% comparable to OLEDs

To improve the brightness, contrast and resolution of the display, while reducing costs and the usage of limited resources, scientists have developed different kinds of light-emitting diodes, such as organic light-emitting diodes (OLEDs), quantum dots LEDs (QLEDs), perovskite-based LEDs (PVSK LEDs) and micro LEDs. Compared to OLEDs, which are widely used in high-end consumer-electronics, the external quantum efficiency of perovskite-based LEDs has rapidly been improved from 0.76 % to 20.7 % in...

The key elements to measure higher efficiency of perovskite LED devices

Who is the winner in the high efficiency contest of LED devices? Light-emitting diodes (LEDs) are the main alternative to traditional light sources, and perovskite light-emitting devices plays the key role in the light-emitting field. Although it is not so easy to get into the light-emitting device field; however, LEDs based on metal halide perovskite materials have extraordinary characteristics: narrow emission line widths at high photo-luminescence quantum yield (PLQY), high color purity...

Solvent-controlled growth of inorganic perovskite films in dry environment for efficient and stable solar cells

Is the inorganic perovskite solar cell a trend in the future? In the highly competitive solar industry, perovskite solar cells have leapt toward commercialization, and challenged the silicon solar cells holding the largest market share at present. Perovskite solar cells have high optical absorption, low cost compared with silicon solar cells, and can be dissolved in solvent and then spray coated directly onto substrate. If its instability and deterioration on exposure to heat problems can ...

Dual-layer tandem technique develops highly efficient perovskite–CIGS tandem solar cell

Waited for three years, the perovskite–CIGS tandem solar cell developed by UCLA Engineering researchers reaches 22.43 % power conversion efficiency. This research was led by Yang Yang, UCLA’s Carol and Lawrence E. Tannas Jr. Professor of Materials Science, also, it was conducted by Qifeng Han, a visiting research associate in Yang’s laboratory, and Yao-Tsung Hsieh and Lei Meng, who both recently earned their doctorates at UCLA. The study’s other authors are members of Yang’s research group...

Characterization of tandem perovskite / organic solar cells

Characterization of tandem perovskite /organic solar cells Do you know there are almost 96% publications reporting tandem OPV characterizations characterized their devices insufficiently or even incorrectly!? The original article is as follows: To the Editor — The tandem solar cell approach is a promising concept for organic photovoltaics (OPVs). However, efficiency determination or, in general, electrical characterization of multi-junction solar cells is challenging. We performed a lit...

A solar checklist for papers

A solar checklist for papers Nature Publishing Group highly recommends authors of papers related to solar-cell research complete this solar checklist of submitted information to aid the reproducibility and transparency of results. The original article is as follows: Authors of papers related to solar-cell research will now be asked to complete a checklist of submitted information to aid the reproducibility and transparency of results. Following discussion with experts in the ph...