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Record organic solar cell efficeincy

Heliatek 3 junction record organic solar cell

German organic solar cell from Heliatek is claiming a record conversion efficiency at 13.2% for multi-junction cell. “Heliatek as demonstrated continuous progress from 3% to more than 13% efficiency over the last 10 years. It supports its roadmap towards 15% efficient organic solar cells,” said the firm. Thanks to the low light and high temperature behaviour of the organic semiconductor, the ...

UK firms to develop Na-ion batteries

Faradion

Faradion of Sheffield and Caithness battery make AGM Batteries have agreed to commercialise sodium-ion (Na-ion) batteries. Sodium is proposed as a cheaper alternative to relatively-rare lithium in rechargeable cells. “it is expected that sodium-ion batteries will also cost around 30% less to produce compared to conventional lithium ion technologies,” said Faradion, which has sodium ion intellectual property. One of the ...

Samsung and UK-based Codeplay address mobile GPU power

Andrew Richards, CodePlay

Samsung Electronics UK is part of a European Union-funded research project to develop a power analyst tool to make the mobile graphics processor (GPU) more power efficient. Samsung has teamed up with Edinburgh-based GPU technology company Codeplay, Greece-based silicon IP developer Think Silicon and TU Berlin to develop a tool for enabling smartphone batteries to last longer while running advanced video ...

Relays handle increasing solar loads

Zettler AZSR1200 solar relay

Zettler has introduced series of 80, 120 and 200A solar relays for switching ac current in inverters. Contact gaps are wider than the firm’s previous offerings, at 4.6mm for use at up to 5,000m above sea level in the 200A version (pictured). “Zettler is responding to increasing demands for wider contact gaps in solar relays to fulfil ever higher isolation requirements ...

Intel and On Semi partner for motor control

Intel is finally getting a toe-hold in deeply embedded designs, through a tie-up with On Semiconductor for motor control. The leader in PC processing, Intel is looking for ways into embedded, low-power and IoT applications – where ARM’s architecture is dominating. The idea for an embedded collaboration came out of a chance meeting between Intel and On company executives early ...

Viewpoint: GaN power amps start with the transistor

24jun15GaNFigure 1

The first step in designing a microwave frequency power amplifier monolithic microwave integrated circuit on a given GaN foundry process is to select the transistor size and bias, writes Liam Devlin. The high breakdown voltage and operating temperature capability of high electron mobility transistors (HEMTs) fabricated on a gallium nitride (GaN) semiconductor process makes the technology well suited to building ...

All SiC switching fits 10kW converter into five litre box

Rohm Vincotech MNPC topology

Rohm Semi and German lab Fraunhofer ISE have used SiC (silicon carbide) transistors to squeeze a 10kW power converter into 23 x 21 x 10cm and 4,5kg. For better efficiency, the topology chosen is mixed voltage neutral-point clamped (MNPC, see diagram) – also known as ‘neutral point piloted’ (NPP) and ‘T-type’, according to the team – which has 12 transistors ...

GravityLight replace kerosene with a wind-up light

GravityLight

GravityLight is a mass-powered light for places where there is no electricity. Hang a 12.5kg bag of rocks the hook, and it slowly falls 2m over 20 minutes producing electricity for the LED. The artists impression is of the second version, GL2, which is now well on the way, and the subject of an Indegogo campaign. Learning from GL1, of which ...

Silicon carbide device start-up powers ahead in Coventry

Anvil Semiconductors

Coventry-based start-up Anvil Semiconductors is developing power diodes, power mosfets and perhaps LEDs using a novel silicon carbide (SiC) process technology. The company’s technique is to deposit SiC with a “3C” crystal structure on a silicon wafer, in effect SiC-on-silicon. Transistors made from SiC and gallium nitride (GaN) are being proposed as alternatives to silicon in power applications because they ...

GaN on show at PCIM Asia

GaN Systems GS66516T

Transistor maker GaN Systems of Canada will be showing a 650V 30A three-phase inverter power module from LS Industrial Systems of Korea made using GaN transistors on its stand at PCIM Asia. Also featured will be a 3kW, 800/380V DC/DC bidirectional converter developed by the NextHome consortium in the USA. Of its own components, the firm is promoting the GS66516T 60A ...