Abstract
Here, we develop a method to prepare a dopant-free hole transporting material by blending an organic semiconductor and a conjugated polymer with 1,8-diiodooctane (DIO) additive. The normal-type solar cell based on the hole transporting material (HTM) blend with DIO + PCDTBT shows enhanced efficiency up to 18.0% compared to 14.7% for the device using the pristine small molecule. Incorporation of DIO results in increased crystallinity, while the conjugated polymer induces an intermolecular network for efficient charge transport with improved film morphology. Consequently, the HTM blend with DIO + PCDTBT shows a higher hole mobility and more efficient charge transfer at the perovskite/hole transporting layer interface compared with the pristine HTM. Furthermore, the solar cell introducing the HTM blend with DIO shows high mechanical and moisture stability; the compact and homogeneous film of high crystalline HTM shows more adhesive contact with perovskite and effectively prevents the penetration of moisture. The efficiency of the unencapsulated device using a small molecular HTM decreases to 60%, whereas the corresponding device with HTM blend maintains 80% performance after storage under 85% relative humidity and 85 °C.
| Original language | English |
|---|---|
| Pages (from-to) | 167-175 |
| Number of pages | 9 |
| Journal | Journal of Power Sources |
| DOIs | |
| Publication status | Published - 2019 Apr 1 |
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Keywords
- Dopant-free
- Enhanced stability
- Hole transporting materials
- Perovskite solar cell
- Polymer blend
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
Enhancing performance and stability of perovskite solar cells using hole transport layer of small molecule and conjugated polymer blend. / Hwang, Hansu; Park, Sungmin; Heo, Jin Hyuck; Kim, Wansun; Ahn, Hyungju; Kim, Taek Soo; Im, Sang Hyuk; Son, Hae Jung.
In: Journal of Power Sources, 01.04.2019, p. 167-175.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhancing performance and stability of perovskite solar cells using hole transport layer of small molecule and conjugated polymer blend
AU - Hwang, Hansu
AU - Park, Sungmin
AU - Heo, Jin Hyuck
AU - Kim, Wansun
AU - Ahn, Hyungju
AU - Kim, Taek Soo
AU - Im, Sang Hyuk
AU - Son, Hae Jung
PY - 2019/4/1
Y1 - 2019/4/1
N2 - Here, we develop a method to prepare a dopant-free hole transporting material by blending an organic semiconductor and a conjugated polymer with 1,8-diiodooctane (DIO) additive. The normal-type solar cell based on the hole transporting material (HTM) blend with DIO + PCDTBT shows enhanced efficiency up to 18.0% compared to 14.7% for the device using the pristine small molecule. Incorporation of DIO results in increased crystallinity, while the conjugated polymer induces an intermolecular network for efficient charge transport with improved film morphology. Consequently, the HTM blend with DIO + PCDTBT shows a higher hole mobility and more efficient charge transfer at the perovskite/hole transporting layer interface compared with the pristine HTM. Furthermore, the solar cell introducing the HTM blend with DIO shows high mechanical and moisture stability; the compact and homogeneous film of high crystalline HTM shows more adhesive contact with perovskite and effectively prevents the penetration of moisture. The efficiency of the unencapsulated device using a small molecular HTM decreases to 60%, whereas the corresponding device with HTM blend maintains 80% performance after storage under 85% relative humidity and 85 °C.
AB - Here, we develop a method to prepare a dopant-free hole transporting material by blending an organic semiconductor and a conjugated polymer with 1,8-diiodooctane (DIO) additive. The normal-type solar cell based on the hole transporting material (HTM) blend with DIO + PCDTBT shows enhanced efficiency up to 18.0% compared to 14.7% for the device using the pristine small molecule. Incorporation of DIO results in increased crystallinity, while the conjugated polymer induces an intermolecular network for efficient charge transport with improved film morphology. Consequently, the HTM blend with DIO + PCDTBT shows a higher hole mobility and more efficient charge transfer at the perovskite/hole transporting layer interface compared with the pristine HTM. Furthermore, the solar cell introducing the HTM blend with DIO shows high mechanical and moisture stability; the compact and homogeneous film of high crystalline HTM shows more adhesive contact with perovskite and effectively prevents the penetration of moisture. The efficiency of the unencapsulated device using a small molecular HTM decreases to 60%, whereas the corresponding device with HTM blend maintains 80% performance after storage under 85% relative humidity and 85 °C.
KW - Dopant-free
KW - Enhanced stability
KW - Hole transporting materials
KW - Perovskite solar cell
KW - Polymer blend
UR - http://www.scopus.com/inward/record.url?scp=85061842047&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061842047&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2019.02.017
DO - 10.1016/j.jpowsour.2019.02.017
M3 - Article
AN - SCOPUS:85061842047
SP - 167
EP - 175
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -