Saidov M. S. Approximate Effectiveness Evaluation of Si Solar Cell Tandem with Photothermopile. // Applied Solar Energy. 2013. V. 49. No. 2. pp. 86–88.

The idea that it is feasible to develop commercial solar cells tandem with a photothermopile based on a narrowgap semiconductor is proposed. The operation and efficiency of a Si solar cell in tandem with a photothermopile based on a semiconductor with a band gap of ~0.3 eV is discussed. It is shown that, at an operating temperature of 60–75°C, the tandem efficiency can be increased by more than 50% as compared with the Si solar cell efficiency.