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Here we present modeling results on crystalline Si (c-Si)/amorphous Si (a-Si) heterojunction solar cells using a physical simulation which includes various models for the defect states in the a-Si barriers, as well as explicit models for the ITO emitter contact. We investigate the impact of the band offsets and barrier heights of the a-Si/c-Si interface, particularly in terms of the open circuit voltage...
Nano diodes show great potential for applications in detectors, communications and energy harvesting. In this work, we focus on nano transfer printing (nTP) to fabricate nm-scale diodes over extensive areas. Using a temperature-enhanced process, several millions of diodes were transfer-printed in one single step. We show the reliable transfer of functioning MIM diodes, which were electrically characterized...
Nano antenna arrays are excellent devices for infrared detection (terahertz radiation). We present our latest results on the production of nano antennas fabricated in a nano transfer printing process. The molecular beam epitaxy (MBE) technique allows the growth of AlGaAs/GaAs-stamps which are used to fabricate nano antennas with a high aspect ratio of 104. Additionally, Si-stamps have been manufactured...
Hybrid CMOS-imagers with vertically integrated organic semiconductors are proposed to enhance the currently small fill factor of conventional CMOS-pixels. Organic photodetectors (OPDs) are low-cost and easy processable and their performance begins to match the one of silicon based devices. Therefore, they are advantageous compared to other hybrid concepts like costly microlenses or thin-film-on-ASIC...
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