Article last updated on: Jan 08, 2018

Toshiba and NEDO develop a large film-based perovskite photovoltaic module With 11.7% PCE

New Energy and Industrial Technology Development Organization (NEDO) and Toshiba have announced the world's largest film-based perovskite photovoltaic module. The module is 703cm2 (24.15 x 29.10cm) and achieves a power conversion efficiency (PCE) of 11.7%, overcoming the difficulties of increasing size and efficiency at the same time.

Toshiba and NEDO develop a large film-based perovskite photovoltaic module image

The module was developed using the meniscus printing technology owned by Toshiba and a newly developed printing process. Toshiba developed the printing process for a larger module by controlling the chemical reaction between PbI2 and MAI on the substrate, using the ink composition as a mechanism. The company has also improved the uniformity of the layer thickness and increased the homogeneity of the crystal layer properties over a larger area, by controlling the process and adjusting the perovskite crystal growth conditions during the printing process. As a result, a PCE of 11.7% has been obtained on a module with an area of 703cm2, almost as large as 900cm2, the practical a scale.

Microquanta reaches 17.9% for perovskite solar mini-module

Microquanta Semiconductor logo Microquanta Semiconductor has announced reaching "a new world record of 17.3% conversion efficiency for perovskite solar mini-module under newly established testing protocols for perovskite devices". This result was reportedly certified by the international test center Newport Corp.

Under these new protocols, the stabilized 17.3% efficiency rating was for a 7-cell perovskite solar module with designated illumination area of 17.277 cm2. The best device reached an even higher number of 17.9% with conventional testing methods. The desired efficiency was achieved by further optimizations of perovskite materials and manufacturing processes. This is the company’s fourth continuous breakthrough regarding efficiency of perovskite solar modules and the first one under new internationally accepted protocols. Since 2017, Microquanta had pushed the efficiency record up from 15.2% to 16%, and then to above 17% before this new accomplishment.

Researchers reach breakthrough in perovskite solar cell technology

A team of researchers from Peking University and the Universities of Surrey, Oxford and Cambridge have developed a new way to reduce an unwanted process called non-radiative recombination, where energy and efficiency is lost in perovskite solar cells. This technique has reportedly produced "the highest performing inverted perovskite solar cell ever recorded".

Team makes progress in PSC technology image

The team created a technique called Solution-Process Secondary growth (SSG) which increased the voltage of inverted perovskite solar cells by 100 millivolts, reaching a high of 1.21 volts without compromising the quality of the solar cell or the electrical current flowing through a device. They tested the technique on a device which recorded a PCE of 20.9%, which is said to be the highest certified PCE for inverted perovskite solar cells ever recorded.

Oxford PV sets new record with perovskite tandem solar cells with 27.3% conversion efficiency

Oxford Photovoltaics has reported a new perovskite tandem solar cell record, certified by Fraunhofer ISE at a conversion efficiency of 27.3%. Oxford PV’s latest record for a 1 cm2 perovskite-silicon tandem solar, reportedly exceeds the 26.7% efficiency world record for a single-junction silicon solar cell.

Oxford PV sets new record with perovskite tandem solar cells with 27.3% conversion efficiency image

Oxford PV recently produced a 1 cm2 perovskite-silicon two-terminal tandem solar cell with a verified conversion efficiency of 25.2%, through an ongoing collaboration with Helmholtz-Zentrum Berlin (HZB) and the Photovoltaics and Optoelectronics Device Group at the University of Oxford, led by Professor Snaith.

Researchers hail spray coating as a potential way to solve a major challenge in mass production of perovskite solar cells

Researchers from the universities of New York, Peking, Electronic Science and Technology of China, Yale and Johns Hopkins report they have solved a major challenge to the commercial production of perovskite solar cells, by turning to spray coating. The scientists say spraying can apply the electron transport layer (ETL) uniformly across a large area, and is suitable for manufacturing large solar panels and ensuring high performance.

Spray coating in applying ETL to perovskites image

The research team reported spray coating led to a 30% efficiency gain over other ETLs – translating to a power conversion efficiency leap from 13% to over 17% – and even resulted in fewer defects.