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Nano energy v.31, 2017년, pp.403 - 409   SCIE
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Solution-processed colloidal quantum dot/organic hybrid tandem photovoltaic devices with 8.3% efficiency

Aqoma, Havid (Department of Chemistry, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Republic of Korea ) ; Azmi, Randi (Department of Chemistry, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Republic of Korea ) ; Oh, Seung-Hwan (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute (KAERI), 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 580-185, Republic of Korea ) ; Jang, Sung-Yeon (Department of Chemistry, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Republic of Korea ) ;
  • 초록  

    Abstract High-efficiency colloidal quantum dot (CQD)/organic hybrid tandem photovoltaic devices (HT-PVs) are developed through a low-temperature solution process. PbS-CQDs and blends of PTB7-Th/PC 71 BM are used as the active materials for front- and back-cells, respectively. The effective series connection of the two heterogeneous sub-cells is successfully achieved using MoOx/Au/ZnO-based intermediate recombination layers (IMLs). By fine-tuning the current densities in the sub-cells and optimizing the IMLs by balancing the optical and electrical properties, HT-PVs with power conversion efficiency (PCE) of 8.27% ( V OC of 1.27V, J SC of 10.36mAcm −2 , and FF of 0.63) are achieved. Furthermore, the fabrication of HT-PVs is achievable in ambient atmospheric conditions without thermal annealing that have comparable PCE (7.64%). The PCEs exhibited by these HT-PVs are thus far the highest values reported for CQD-based tandem photovoltaic devices. Highlights Record efficiency (8.3%) for quantum dot/organic hybrid tandem photovoltaic devices. Successful current matching of the two sub-cells with absorption overlap. Development of efficient intermediate layers for hybrid tandem photovoltaic devices. High efficiency (7.6%) quantum dot/organic hybrid tandem photovoltaic devices by room-temperature annealing-free fabrication process. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Colloidal quantum dot photovoltaic .   Organic photovoltaic .   Lead sulfide .   Hybrid tandem solar cell .   Intermediate layer.  

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