Ph.D. student (F/M)

The group of Semiconductor Components at the University of Twente is part of the Faculty of Electrical Engineering, Mathematics and Computer Science and the MESA+ Institute for Nanotechnology. MESA+ is the largest research institute of the University of Twente. The institute trains graduate students and PhD-students and conducts research in the fields of nanotechnology, microsystems, materials science and microelectronics. Unique of MESA+ is its multidisciplinary composition.

Job description

The group of Semiconductor Components has a vacancy for a Ph.D. student in the project “Silicon-based detector/imager/LED technology”. This project is dedicated to the development of technology that enables the integration of advanced optical functions in Si, with, as ultimate goal, the realization of CMOS-compatible process modules. The basic devices involved are photodiodes and light-emitting diodes, where focus will first be on photodiodes designed to extend the detectable spectral bandwidth from hard X-rays, soft X-rays, vacuum ultraviolet and visual through to infrared (IR) wavelengths. The IR capability will be achieved by deposition of Ge on Si. The starting point of this work is the recently developed PureB Si and PureGaB Ge-on-Si photodiode technologies. One of the main attractions of this approach is that both the Si and Ge-on-Si versions of these photodiodes are CMOS compatible. Single-photon avalanche detectors in both processes and high-speed Si detector configurations have already been demonstrated. Research will be continued to improve photodiode performance and extend the capabilities to create light-emitting diodes. Both silicon and germanium have indirect bandgaps which means that they do not emit light as readily as III-V semiconductors that have a direct bandgap. Nevertheless, the integration in Si is so compelling and the light levels needed in optoelectronic circuits is being reduced by new design approaches, opening the way to attractive solutions involving Ge. Moreover, this project will focus on lowering the processing temperature of the photodiodes while maintaining the exceptional performance. Integration in back-end CMOS is then possible. In cooperation with circuit designer groups, optoelectronics circuits with the new devices will be developed and fabricated.

Type of work: 30% processing of test structures in a Si technology cleanroom, 40% material analysis, 30% electrical characterization.

Your profile

We are looking for a highly motivated and enthusiastic researcher (F/M) with a M.Sc. degree in electrical engineering, nanotechnology, applied physics or a related topic, with excellent theoretical and experimental skills. Proven affinity with semiconductors is necessary. We seek candidates with good team spirit, who like to work in an internationally oriented environment. Fluency in English is a requirement. An interview will be part of the selection procedure.

Applications should include an application/motivation letter, emphasizing your specific interest, qualifications and motivation to apply for this position, a detailed CV (resume), a publication list, and an academic transcript of B.Sc. and M.Sc. education. A TOEFL or IELTS score is generally requested to verify sufficient mastering of the English language. You can electronically apply for this position before October 9th, 2015. For more information please contact our secretary of Semiconductor Components Group Mrs. Remke Assink at

Our offer

We offer an interesting temporary research position in a dynamic and international environment, with the benefits of an industrial laboratory as well as academic research. You will be appointed for a period of four years as a temporary research employee, as detailed in the collective labour agreement of the Dutch Universities. A training program is part of the agreement. You and your supervisor will make up a plan for the additional education and supervising that you specifically need. This plan also defines which teaching activities you will be responsible for (expected to take 10%-20% of your time).

The University of Twente offers excellent working conditions, an exciting scientific environment, and a green and lively campus. We offer


A PhD position for four years (38 hrs/week)


Full status as an employee at the University of Twente, including pension and health care benefits


Gross salary PhD student: ranging from EUR 2125 (1st year) to EUR 2717 (4th year) per month, plus holiday allowance (8%) and end-of-year bonus (8.3%)


Excellent facilities for professional and personal development


Good secondary conditions, in accordance with the collective labour agreement CAO-NU for Dutch universities


A green campus with lots of sports facilities.

The organization

The University of Twente: We stand for life sciences and technology. High tech and human touch. Education and research that matter. New technology which drives change, innovation and progress in society. The University of Twente is the only campus university in the Netherlands; divided over six faculties we provide more than fifty educational programmes. The University of Twente has a strong focus on personal development and talented researchers are given scope for carrying out pioneering research.

The faculty of Electrical Engineering, Mathematics and Computer Science (EEMCS) comprises three disciplines that shape Information and Communication Technology. ICT is more than communication. In almost every product we use mathematics, electronics and computer technology and ICT now contributes to all of societies' activities. The faculty works together intensively with industrial partners and researchers in the Netherlands and abroad and conducts extensive research for external commissioning parties and funders. The research which enjoys a high profile both at home and internationally, has been accommodated in the multidisciplinary research institutes MESA+, CTIT and MIRA.