Improvement of Short-Circuit Current of Quantum Dot Sensitive Solar Cell Through Various Size of Quantum Dots

Seung Hwan Ji; Hye Won Yun; Jin Ho Lee; Bum-Sung Kim; Woo-Byoung Kim

doi:10.3740/MRSK.2021.31.1.16

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2021 Vol.31, Issue 1 Preview Page Next Page

Improvement of Short-Circuit Current of Quantum Dot Sensitive Solar Cell Through Various Size of Quantum Dots 양자점 입도제어를 통한 양자점 감응형 태양전지 단락전류 향상

January 2021. pp. 16-22

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Abstract

In this study, quantum dot-sensitized solar cells (QDSSC) using CdSe/ZnS quantum dots (QD) of various sizes with green, yellow, and red colors are developed. Quantum dots, depending their different sizes, have advantages of absorbing light of various wavelengths. This absorption of light of various wavelengths increases the photocurrent production of solar cells. The absorption and emission peaks and excellent photochemical properties of the synthesized quantum dots are confirmed through UV-visible and photoluminescence (PL) analysis. In TEM analysis, the average sizes of individual green, yellow, and red quantum dots are shown to be 5 nm, 6 nm, and 8 nm. The J-V curves of QDSSC for one type of QD show a current density of 1.7 mA/cm² and an open-circuit voltage of 0.49 V, while QDSSC using three type of QDs shows improved electrical characteristics of 5.52 mA/cm² and 0.52 V. As a result, the photoelectric conversion efficiency of QDSSC using one type of QD is as low as 0.53 %, but QDSSC using three type of QDs has a measured efficiency of 1.4 %.

Keywords

quantum dot-sensitized solar cell

QD size control

QD synthesis

CdSe/ZnS

DSSC

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 31
No :1
Pages :16-22
Received Date : 2020-11-02
Revised Date : 2020-12-08
Accepted Date : 2020-12-08
DOI :https://doi.org/10.3740/MRSK.2021.31.1.16

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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