Semprius Inc., a Durham-based solar-module manufacturer, raised $995,238 of a $2 million debt offering, according to a regulatory filing. The company’s technology lets it create the world’s smallest solar cells to deliver a uniquely high concentration of the cells, which are about the size of a pencil point, to achieve cost and performance advantages.

The company recently received a competitive $2.9 million grant from the U.S. Department of Energy’s Advanced Research Projects Agency-Energy. It received more than $11 million in previous grants.

It has also raised more than $40 million in venture capital from backers including Durham’s Intersouth Partners, ARCH Venture Partners, and Siemens Venture Capital. In addition, the company received more than $8 million in debt funding.

It disclosed the most recent debt offering in a filing with the U.S. Securities and Exchange Commission. (Here’s the filing:

Semprius is a graduate of the U.S. Department of Energy’s SunShot Incubator Program.

Semprius has been at the forefront of high-efficiency, HCPV solar module development for the past seven years. In 2012, Semprius announced the first mass-produced photovoltaic module that exceeded 33 percent efficiency. In September 2013, Semprius increased this record to 35.5 percent, as confirmed by the Fraunhofer Institute for Solar Energy Systems ISE in Germany.

Semprius was named to MIT Technology Review’s 2013 50 Disruptive most innovative technology companies. Semprius’ headquarters and production facilities.

On the web:

Crunchbase list of Semprius’ funding history: