Cho, Seongeun Kim, Youngjun Kim, Minkyoing Kim, Jin-A. Kim, Kihyun Park, Yujin Han, Soojin Han, Chang-Yeol Kim, Jong-Hoon Hwang, Jun Yeon Park, Jun-Young Kim, Eugene Yang, Heesun Park, Byoungnam 2024-01-20T01:33:37Z 2024-01-20T01:33:37Z 2021-09-01 2017-05 0927-0248 https://pubs.kist.re.kr/handle/201004/122821 We demonstrate that, through formation of Zn1-xMgxO nanocrystal solid solution (NCSS) coupled with lead sulfide (PbS) nanocrystal (NC) of different size, optoelectronic properties of a donor-acceptor energy harvesting assembly can be probed and tuned. In the ITO/PEDOT:PSS/PbS/Zn1-xMgxO/Al arrangement as a photovoltaic test probe, simultaneous tuning of Zn1-xMgxO NC solid solution (NCSS) and PbS NC in a narrow range in the energy levels is achieved altering the open circuit voltage and the short circuit current as measures of donor/acceptor interfacial electronic properties. With the Mg composition increasing, the energy band gap of the Zn1-xMgxO NCSS (acceptor) increases with its conduction band edge becoming closer to the lowest occupied molecular orbital level of the PbS NC (donor), increasing splitting of quasi-Fermi energy levels in the electron donor/acceptor assembly under illumination. More amount of Mg in the NCSS leads to transition from an energy level limited regime to a trap-induced charge transport limited regime, evidenced by a simultaneous decrease in the open circuit voltage and the short circuit current. This new finding provides insights of trade-off between the energy level off-set and the trap-induced charge transport degradation in engineering interfacial charge transfer and transport via formation of NCSS in integrating modern electronic devices. English ELSEVIER SCIENCE BV Quantized interfacial properties at lead sulfide/Zn1-xMgxO energy harvesting assembly: Formation of nanocrystal solid solution Article 10.1016/j.solmat.2017.02.022 1 SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.164, pp.156 - 164 SOLAR ENERGY MATERIALS AND SOLAR CELLS 164 156 164 N scie scopus 000396956000021 2-s2.0-85013414344 Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Energy & Fuels Materials Science Physics Article OPEN-CIRCUIT VOLTAGE HETEROJUNCTION SOLAR-CELLS MG-DOPED ZNO QUANTUM DOTS THIN-FILMS PHOTOLUMINESCENCE SHAPE Nanocrystal ZnMgO Functional interface