Graphdiyne Quantum Dots for Much Improved Stability and Efficiency of Perovskite Solar Cells

• DOI: 10.1002/admi.201701117
• Publication Date: 2017-11-24T14:41:26Z
• Authors: Xisheng Zhang; Qian Wang; Zhiwen Jin; Yanhuan Chen; Huibiao Liu; Jizheng Wang; Yuliang Li; Shengzhong (Frank...
• Keywords: Passivation; Perovskite solar cell; Thermal Stability

Abstract Comparing to other carbon materials, the general graphyne structure is much superior in terms of adaptable bandgap, uniformly distributed pores, more design flexibility, easier for chemical synthesis, pliable electronic properties, and smaller atomic density. Herein, novel γ‐graphdiyne quantum dots (GD QDs) are used perovskite solar cells as a surface modifier or dopant TiO 2 , CH 3 NH PbI Spiro‐OMeTAD realize multiple advantageous effects, hoping that it would form effective carrier transport channel boosted cell performance. First, presence GD QDs on increases grain size higher current density fill factor. Second, at each interface reduce conduction band offset, passivate suppressed recombination attain open‐circuit voltage. Third, improves hydrophobicity eliminates pinholes film enhanced stability. As result, optimized device shows >15% enhancement power conversion efficiency (from 17.17 19.89%) comparing reference device. More significantly, stability was improved harsh environment (moist air, UV irradiation, thermal conditions). It expected will find their applications efficient stable optoelectronic devices.