Journal
ADVANCED ENERGY MATERIALS
Volume 6, Issue 24, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201601114
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Funding
- National Research Foundation of Korea (NRF) - Korea government [2016R1C1B2014644]
- Kyung Hee University [KHU-20150515]
- Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant - Korean government [20143030011530, 2015030012870]
- Pioneer Research Center Program through the National Research Foundation of Korea
- Ministry of Science, ICT, and Future Planning [2016M3C1A3909138]
- Nanomaterial Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2009-0082580]
- National Research Foundation of Korea [2016R1C1B2014644, 2013M3C1A3065033] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Nanopatterned CuInGaS2 (CIGS) thin films synthesized by a sol-gel-based solution method and a nanoimprint lithography technique to achieve simultaneous photonic and electrical enhancements in thin film solar cell applications are demonstrated. The interdigitated CIGS nanopatterns in adjacent CdS layer form an ordered nanoscale heterojunction of optical contrast to create a light trapping architecture. This architecture concomitantly leads to increased junction area between the p-CIGS/n-CdS interface, and thereby influences effective charge transport. The electron beam induced current and capacitance-voltage characterization further supports the large carrier collection area and small depletion region of the nanopatterned CIGS solar cell devices. This strategic geometry affords localization of incident light inside and between the nanopatterns, where created excitons are easily dissociated, and it leads to the enhanced current generation of absorbed light. Ultimately, this approach improves the efficiency of the nanopatterned CIGS solar cell by 55% compared to its planar counterpart, and offers the possibility of simultaneous management for absorption and charge transport through a nanopatterning process.
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