Efficiency - Page 3

Researchers at CHOSE (Centre for Hybrid and Organic Solar Energy) at University of Rome ‘‘Tor Vergata’’ and Solertix (affiliated with Italy-based solar manufacturer FuturaSun) have reported reduced yield losses in cell-to-module scaling by utilizing ultranarrow interconnection of 19.5 μm. 

In addition, the proposed interconnection technique may be used to achieve a 30% efficiency in area-matched 4T tandem designs featuring a perovskite module over a silicon cell.

China-based global PV and ESS supplier, Jinko Solar, has announced a significant breakthrough in the development of its N-type TOPCon-based perovskite tandem solar cell.

Tested by the Shanghai Institute of Microsystem and Information Technology, the cell reportedly achieved an impressive conversion efficiency of 33.24%. This enhancement surpasses JinkoSolar's previous record of 32.33% for the same type of tandem cells.

Researchers at the Chinese Academy of Sciences (CAS), in collaboration with Japan's Yamagata University, developed three isomeric bisphosphonate-anchored self-assembled molecules (SAMs) to achieve highly efficient and stable inverted perovskite solar cells (PSCs).

The wettability, absorbability and compactness of SAMs, which are used as hole-transporting layers (HTLs) for PSCs, critically affect the efficiency and stability of the devices. Therefore, the researchers proposed a molecular strategy to synthesize three bisphosphonate-anchored indolocarbazole (IDCz)-derived SAMs, namely IDCz-1, IDCz-2, and IDCz-3. The three SAMs with different positions of the two nitrogen atoms in the IDCz unit were each employed on conductive oxide substrates for inverted PSCs.

Researchers at China's Qingdao University of Science and Technology and Canada's University of Toronto have developed a thermal regulation strategy by incorporating carboranes into perovskites to improve the performance of inverted tin-lead perovskite tech for all-perovskite tandem solar cells. 

The Chinese-Canadian research group has designed a monolithic all-perovskite tandem solar cell that utilizes a top inverted perovskite PV device based on an absorber made with mixed tin-lead (Sn-Pb) perovskite via the newly developed thermal regulation strategy.

Researchers from China's Beihang University and Changchun University of Technology have developed a new surface engineering strategy to build low-cost solar cells without a hole transport layer. The devices were treated with benzoylcholine halide to reduce non-radiation recombination and achieved impressive efficiency and stability.

The research group developed a carbon-based all-inorganic perovskite solar cell without the use of an expensive hole transport layer (HTL). In the proposed cell architecture, the absence of the HTL, which prevents direct contact between the carbon electrode and the perovskite, is compensated by engineering the surface composition of the perovskite film. ”The bipolar transport of the perovskite layer and the hole extraction ability of the carbon electrode provide a theoretical basis for the preparation of HTL-free CsPbI₂Br carbon-based all-inorganic perovskite solar cells,” the researchers said in their study.

The Korea Research Institute of Chemical Technology (KRICT) and Korean semiconductor equipment maker UniTest have announced the joint development of a large-area perovskite solar cell with 20.6% efficiency, which they define as a record-breaking achievement.

They reportedly received the world’s highest efficiency certification from Fraunhofer and will be listed on the U.S. National Renewable Energy Laboratory (NREL)’s solar cell efficiency chart.

Researchers from the University of Victoria, University of British Columbia and Henan University recently used a cadmium iodide doping technique to stabilize the blade coating process in the manufacturing of solar cells based on formamidinium lead iodide (FAPbI₃) perovskite. The team built a cell showing a considerable increase in efficiency compared to an identical device without cadmium doping.

FAPbI₃ is one of the most promising perovskite materials for solar cell applications, as it offers a narrow energy bandgap and remarkable stability. However, there are still challenges to overcome considering the FAPbI₃ polymorphism issue and its hypersensitivity to fabrication conditions. The scientists hypothesized that introducing a homovalent Pb-site additive would be beneficial, and one such alternative is cadmium.

Small-molecule ionic liquids are frequently used as efficient bulk phase modifiers for perovskite materials. However, their inherent characteristics, such as high volatility and ion migration, pose challenges in addressing the stability issues associated with perovskite solar cells (PSCs). Recently, researchers at China's Northwestern Polytechnical University and CNPC Tubular Goods Research Institute designed improved poly ionic liquids (ILs) with multiple active sites as efficient additives for perovskite materials.

The team's recent work shows how additive engineering with a polymerized ionic liquid to the metal halide perovskite material can improve the solar cell's function, helping to pave the way for the adoption of perovskite solar cells.

Researchers at China's Shanghai University of Electric Power have used dibenzoylmethane (DBM) as a precursor additive introduced in order to regulate the crystallization of CsPbI₂Br perovskite while passivating its associated defects. 

Inorganic CsPbI₂Br perovskite solar cells (PSCs) have attracted massive interest but the tendency towards unruly crystallization and poor film quality of inorganic CsPbI₂Br perovskites are major factors limiting their performance improvement. In their recent work, the scientists used DBM additive engineering for efficient and stable carbon-based CsPbI₂Br PSCs.

Researchers from India's Chiktara University have reported improved stability and performance of organic-inorganic perovskite solar cells by applying a strategy called bandgap grading.

The method is based on enabling the cell perovskite absorber to collect a wider range of light photons by modifying its thickness and characteristics. The team explains that its recent study demonstrates the effectiveness of both linear and parabolic bandgap grading strategies in optimizing light absorption and boosting performance, showing its potential.