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Issue 107, 2016, Issue in Progress
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Improved efficiency of solution-processed bulk-heterojunction organic solar cells and planar-heterojunction perovskite solar cells with efficient hole-extracting Si nanocrystals

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Abstract

We demonstrate the efficiency enhancement and efficient hole extraction achieved by undoped Si nanocrystals (NCs) and p-type Si (p-Si) NCs in solution-processed bulk-heterojunction (BHJ) organic solar cells (OSCs) and planar-heterojunction (PHJ) perovskite solar cells (PrSCs). We observed that the surface coverage of Si–NCs on the substrate significantly affected the photovoltaic performance of the BHJ OSCs and PHJ PrSCs. The undoped Si NCs and p-Si NCs enhanced the power conversion efficiencies (PCEs) of the BHJ OSCs by ∼6% and ∼11%, respectively, and those of PHJ PrSCs by ∼22% and ∼23%, correspondingly, compared with the PCEs of devices without Si NCs. The p-Si NCs had a highest occupied molecular orbital (HOMO) energy level ∼0.16 eV higher than that of undoped Si NCs and showed better balances with the HOMO energy levels of the PTB7-Th and MAPbI3 perovskite materials, achieving an increase in the hole mobility of the BHJ system, and thus demonstrating their key role as hole-extracting materials.

Graphical abstract: Improved efficiency of solution-processed bulk-heterojunction organic solar cells and planar-heterojunction perovskite solar cells with efficient hole-extracting Si nanocrystals

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Article information


Submitted
29 Sep 2016
Accepted
28 Oct 2016
First published
28 Oct 2016

RSC Adv., 2016,6, 104962-104968
Article type
Paper

Improved efficiency of solution-processed bulk-heterojunction organic solar cells and planar-heterojunction perovskite solar cells with efficient hole-extracting Si nanocrystals

H. Jeong, H. Kim, W. Song, K. Yoo, J. Rama and J. K. Lee, RSC Adv., 2016, 6, 104962
DOI: 10.1039/C6RA24205G

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