1. A hydro/oxo-phobic top hole-selective layer for efficient and stable colloidal quantum dot solar cells
- Author
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Jung-Yong Lee, Se-Woong Baek, Jung Hoon Song, Sang Hoon Lee, Sohee Jeong, Ye-Seol Ha, Hyungjun Kim, Changjo Kim, and Hyeyoung Shin
- Subjects
Materials science ,Passivation ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,Photovoltaics ,law ,Solar cell ,Environmental Chemistry ,Lead sulfide ,Thin film ,Renewable Energy, Sustainability and the Environment ,business.industry ,Energy conversion efficiency ,Doping ,021001 nanoscience & nanotechnology ,Pollution ,0104 chemical sciences ,Nuclear Energy and Engineering ,chemistry ,Quantum dot ,Optoelectronics ,0210 nano-technology ,business - Abstract
In this report, we explore the underlying mechanisms by which doped organic thin films as a top hole-selective layer (HSL) improve the performance and stability of colloidal quantum dot (CQD)-based solar cells. Molecular dynamics-based theoretical studies prove that the hydro/oxo-phobic properties of the HSL serve to efficiently passivate the CQD solid. Furthermore, the robust and outstanding electrical properties of the HSL, simultaneously ensure a high power conversion efficiency (PCE) and increase the stability performance of CQD-based solar cells. As a result, a best PCE of 11.7% in a lead sulfide (PbS)-based CQD solar cell is achieved and over 90% of the initial performance is retained after 1 year storage under ambient conditions.
- Published
- 2018