Post-doctoral Researcher, Semiconductor Materials & Devices

Introduction: The Johns Hopkins University Applied Physics Laboratory (APL), a national leader in scientific research and development, located midway between Baltimore and Washington, DC is seeking a post-doctoral researcher with a strong background in semiconductor materials and devices for solid state energy conversion technologies..

Job Summary: The Research and Exploratory Development Department (REDD) at APL has a strong and growing R&D initiative to pursue innovative solid-state energy technologies in order to support the ever-increasing energy and power demands in both national security and health applications. The technologies that we are developing encompass photovoltaics, thermoelectric devices, and other cutting-edge concepts, where we explore various ‘out-of-the-box’ and game-changing ideas and realize their feasibility through working prototypes in a laboratory. As an example, we are developing a new solar cell materials and devices to extend the endurance of various applications such sensors, unmanned vehicles, and stealth robots. This position will engage in a wide spectrum of R&D including but not limited to fabricating and characterizing organic and inorganic semiconducting materials, testing semiconductor devices, and studying photo-physics and device physics/modeling. The candidate is also expected to perform leading research by developing efficient energy materials and devices based on a solid theoretical foundation and through a hypothesis-driven problem-solving approach. The successful candidate would work and communicate closely and effectively with the materials R&D team to ensure all tasks are performed to extremely high standards.

Duties (Listed in order of importance with the estimated amount of time spent at each task):

1. Work with different PI(s) as a part of team to conduct project(s) in energy converting semiconducting materials and devices, and related applications. Duties include, but are not limited to concept studies, thin-film growth, materials characterization, device fabrication/test/modeling, prototyping, writing reports, and the facilitation, operation, and maintenance of laboratory equipment. (40%)

2. Independently pursue research in semiconductor materials and devices for power and energy technologies (25%)

3. Develop analytical and/or numerical models to explain new ideas and the data from materials, devices, and their applications (15%)

4. Publishing and presenting results in peer reviewed journals and at relevant conferences (15%)

5. Contribute to sponsor briefings and proposals (5%)

Note: This job summary and listing of duties is for the purpose of describing the position and its essential functions at time of hire and may change over time.

Required Qualifications:

  • PhD or equivalent degree in any field related to energy conversion technologies, preferably in physics, applied physics, chemistry, materials science, mechanical or electrical engineering by the start date.
  • Fundamental understanding of solid-state physics, semiconductor device physics, and defect engineering, and high-level analytical and modeling capability in photovoltaic materials and devices.
  • Fundamental understanding of recombination kinetics in photovoltaic materials and experimental methods.
  • 3 years of experience in fabricating and testing perovskite materials and devices.
  • 2 years of experience in photovoltaic device modeling
  • Ability to effectively communicate as a team member with good oral and writing skills
  • Organizational skills to maintain laboratories, data, samples, and notebooks.
  • Proficiency with Microsoft Office to include Excel, Word, and PowerPoint.
  • Good interpersonal skills.

Desired Qualifications:

  • Experience with Hall measurement, transient photoluminescence, lasers, and low-temperature measurement.
  • Familiarity with lab data acquisition and analysis tools such as Labview and Matlab
  • Experience with epitaxial film growth, characterization of epitaxial materials, and photolithography for device fabrication in clean room environment
  • Experience with glove box and its maintenance

Special Working Conditions:Occasional travel is necessary for conferences, sponsor visits, etc.

Security: Eligibility for a Secret level clearance is required. Applicant selected will be subject to a government security clearance investigation and must meet the requirements for access to classified information. Eligibility requirements include U.S. citizenship.

Benefits: APL offers a comprehensive benefits package including a liberal vacation plan, a matching retirement program, significant educational assistance, a scholarship tuition program for staff with dependents, and competitive salaries commensurate with skills and experience. For more information about our organization, please visit our web site at

Equal Employment Opportunity:Johns Hopkins University/Applied Physics Laboratory (APL) is an Equal Opportunity/Affirmative Action employer that complies with Title IX of the Education Amendments Acts of 1972, as well as other applicable laws. All qualified applicants will receive consideration for employment without regard to race, color, religion, sexual orientation, gender identity, national origin, disability, or protected Veteran status.

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