Research on efficient and stable perovskite solar cells in the semiconductor institute has made progress
Perovskite solar cells have shown remarkable promise due to their affordability and impressive photoelectric conversion efficiency. Over the past decade, these cells have rapidly advanced, with single-junction perovskite solar cells achieving efficiencies exceeding 25%, while tandem perovskite-based cells have surpassed 30%. Recognized as a key player in future photovoltaic technology, perovskite solar cells continue to attract attention for their potential to revolutionize energy production.
One of the core challenges in developing high-efficiency perovskite solar cells lies in mitigating carrier recombination at grain boundaries or surface defects. Secondary phase lead iodide (PbI2), which forms a type I heterojunction with perovskites, has been a focal point for researchers. However, studies from the Institute of Semiconductors at the Chinese Academy of Sciences revealed that perovskite cells based on PbI2 struggle to balance efficiency and stability (Advanced Materials, 2017, 29, 1703852). The presence of PbI2 can create pathways for perovskite decomposition and ion movement, leading to poor long-term stability and increased hysteresis in electrical performance. Consequently, designing a stable secondary phase that simultaneously addresses defect passivation and material stability remains a critical challenge in this field.
Recently, Dr. You Jingbi and his team at the Institute of Semiconductors made a breakthrough by introducing a small amount of rubidium chloride (RbCl) into perovskite materials. This innovative approach successfully transforms the problematic PbI2 secondary phase into a novel compound, (PbI2)2RbCl (abbreviated as PIRC), which exhibits excellent thermal and chemical stability (Figure 1A and B). Their research demonstrated a marked improvement in the thermal stability of perovskite materials under 85°C conditions, while also increasing the ion migration barrier threefold, significantly reducing ion migration (Figure 1C, D). Additionally, by suppressing PbI2, the team eliminated the bandgap in perovskite materials, expanding their solar light absorption range. Utilizing these highly stable and broad-spectrum light-absorbing perovskite materials, they fabricated a perovskite solar cell with a certified efficiency of 25.6%—currently the highest efficiency reported for a single-junction perovskite solar cell. Furthermore, the device retained 96% of its initial efficiency after 1,000 hours of placement and 80% after accelerated aging at 85°C (Figure 2B, C). This work represents a major step forward in achieving both high efficiency and long-term stability in perovskite solar cells, paving the way for their commercialization.
The findings were published in *Science* under the title "Inactive (PbI2)2RbCl Stabilizes Perovskite Films for Efficient Solar Cells." This research was supported by the National Key R&D Program, the National Natural Science Foundation of China, the CAS Innovation Cross-Team, Central South University, the Beijing Municipal Science and Technology Commission, and other institutions.
Figure 1. A. SEM image of perovskite with PIRC secondary phase; B. XRD patterns of perovskite films with and without PIRC; C and D. Conductance vs. temperature plots of perovskite films with and without PIRC.Figure 2. A. Certification certificate from a third-party authority showing an efficiency of 25.6%; B. J-V curves of devices with and without PIRC under long-term placement; C. Stability of devices with PIRC under 85°C accelerated aging.
This achievement not only highlights the immense potential of perovskite solar cells but also underscores the importance of interdisciplinary collaboration in advancing renewable energy solutions. As research continues to push the boundaries of efficiency and stability, perovskite solar cells stand poised to play a pivotal role in our transition to sustainable energy systems.
Sanitary DS Union Sanitary DS Union consist of a union nut, a welding male, a welding liner and a gasket. It is very popular in sanitary process system. DS union and parts are forged in stainless steel 1.4301 and 1.4404, and machined by CNC to make sure getting high purity surface and good precision, meet the cleanliness of the industries Pharmacy, Beer, Food, Petroleum, Dairy, Beverage,Biotech etc.
Kaysen Steel provide Sanitary DS Union, DS Sanitary Unions, DS Hygienic Unions, Our Sanitary Pipe Unions contain 3A union, DIN union, SMS union, IDF union, RJT union, ISO union, CIP union. Above pipe unions are designed according to different standards of pipelines. If you have any questions or requests, pls feel free to contact us!
Sanitary DS Union – Sanitary Union– Stainless Steel Sanitary Unions: ▪ Size: 1/2″ - 4″ (DN10-DN100) ▪ Material: SS304, SS316L, EN 1.4301, EN 1.4404 etc. ▪ Standard: 3A, DIN11851, SMS, ISO, RTJ, IDF,etc. ▪ Connection Type: Clamped, Welding ▪ Sealing Gasket: Silicone, EPDM, PTFE, Buna-N etc. ▪ Temp.: -30°C / -22°F up to +120°C/ +248°F ▪ Application: Food, Petroleum, Dairy, Pharmacy, Beer, Beverage, Biotech, Cosmetics etc.
