China's tellurium prices are expected to rise further in the short term on the back of rising demand from the downstream solar sector, according to market participants.
The range for 99.99pc grade metal was last assessed at 370-390 yuan/kg ($52-55/kg) ex-works on 12 May, up by 15pc from Yn320-340/kg on 18 February, in response to higher demand driven by a rise in investment in production projects in the cadmium-telluride (Cd-Te) thin film solar sector.
Growing demand from the Cd-Te photovoltaic (PV) industry is expected to support tellurium prices in the longer term, although consumption from the bismuth-telluride refrigeration sector has been affected by the impact of the Covid-19 outbreak.
Domestic Cd-Te thin film solar module manufacturer Advanced Solar Power (ASP) has started building the second phase of its PV project in Jincheng city in north China's Shanxi province, after launching the first phase in September 2019. The project will have a capacity of 80MW after the second phase comes on line in December 2020.
ASP, in partnership with Yangtai Jingxin Coal Industry and Jincheng Chaoneng PV Technology, have also invested Yn550mn to form a subsidiary Shanxi Yangtai ASP Technology that operates a Cd-Te thin film solar module manufacturing plant in north China. The plant's average photoelectric conversion efficiency has exceeded 13pc, with 2m² of Cd-Te thin film solar module able to generate 260-270 kWh/yr of electricity on average.
Fellow Chinese Cd-Te PV module producer Zhongshan Ruike New Energy also in March begun building five new Cd-Te battery production lines with a total capacity of 1GW/yr in Zhongshan city in south China's Guangdong province, after commissioning the first 100 MW/yr production line in June 2018. The firm is a joint venture between Chinese new energy company Mingyang Smart Energy Group and Clean Energy International founded by Stanford Alumni.
State-owned China National Building Material Group (CNBM) has invested, via its subsidiary Triumph Group, Yn4bn to develop a 600 MW/yr Cd-Te PV project in Bengbu city, in south China's Anhui province and Yn4bn in a 600 MW/yr project in Qingdao city in east China's Shandong province. Another CNBM subsidiary International Engineering Corporation will provide technology to the two projects with a photoelectric conversion efficiency of more than 15pc.
Although the bismuth-telluride refrigeration sector has been weakened by the Covid-19 outbreak, the growth of Cd-Te PV industry is expected to support tellurium prices in the long term.