Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 6006497 |
| Seiten (von - bis) | 37-42 |
| Seitenumfang | 6 |
| Fachzeitschrift | IEEE Journal of Photovoltaics |
| Jahrgang | 1 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - Juli 2011 |
Abstract
We demonstrate industrially feasible large-area solar cells with passivated homogenous emitter and rear achieving energy conversion efficiencies of up to 19.4% on 125 mm×125mm p-type 2-3Ω·cm boron-doped Czochralski silicon wafers. Front and rear metal contacts are fabricated by screen printing of silver and aluminum paste and firing in a conventional belt furnace. However, these cells suffer from moderate fill factors below 76% due to an increased series resistance. In this paper, we analyze the main cause of this increase. We vary the rear contact geometry over a wide range. By subtracting the respective contribution of the base from the measured series resistance, we extract a value of (55±10) mOmega;·cm 2 for the effective specific contact resistivity of our screen-printed local aluminum rear contacts. We verify this value by local series resistance mappings from photoluminescence measurements resulting in a contact resistivity of (40±10) mOmega;·cm 2. Our analysis reveals that the highest potential for a further energy conversion efficiency improvement is to decrease the rear contact resistivity.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
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in: IEEE Journal of Photovoltaics, Jahrgang 1, Nr. 1, 6006497, 07.2011, S. 37-42.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Evaluation of Series Resistance Losses in Screen-Printed Solar Cells With Local Rear Contacts
AU - Gatz, Sebastian
AU - Dullweber, Thorsten
AU - Brendel, Rolf
PY - 2011/7
Y1 - 2011/7
N2 - We demonstrate industrially feasible large-area solar cells with passivated homogenous emitter and rear achieving energy conversion efficiencies of up to 19.4% on 125 mm×125mm p-type 2-3Ω·cm boron-doped Czochralski silicon wafers. Front and rear metal contacts are fabricated by screen printing of silver and aluminum paste and firing in a conventional belt furnace. However, these cells suffer from moderate fill factors below 76% due to an increased series resistance. In this paper, we analyze the main cause of this increase. We vary the rear contact geometry over a wide range. By subtracting the respective contribution of the base from the measured series resistance, we extract a value of (55±10) mOmega;·cm 2 for the effective specific contact resistivity of our screen-printed local aluminum rear contacts. We verify this value by local series resistance mappings from photoluminescence measurements resulting in a contact resistivity of (40±10) mOmega;·cm 2. Our analysis reveals that the highest potential for a further energy conversion efficiency improvement is to decrease the rear contact resistivity.
AB - We demonstrate industrially feasible large-area solar cells with passivated homogenous emitter and rear achieving energy conversion efficiencies of up to 19.4% on 125 mm×125mm p-type 2-3Ω·cm boron-doped Czochralski silicon wafers. Front and rear metal contacts are fabricated by screen printing of silver and aluminum paste and firing in a conventional belt furnace. However, these cells suffer from moderate fill factors below 76% due to an increased series resistance. In this paper, we analyze the main cause of this increase. We vary the rear contact geometry over a wide range. By subtracting the respective contribution of the base from the measured series resistance, we extract a value of (55±10) mOmega;·cm 2 for the effective specific contact resistivity of our screen-printed local aluminum rear contacts. We verify this value by local series resistance mappings from photoluminescence measurements resulting in a contact resistivity of (40±10) mOmega;·cm 2. Our analysis reveals that the highest potential for a further energy conversion efficiency improvement is to decrease the rear contact resistivity.
KW - Photovoltaics
KW - resistance
KW - silicon
KW - solar cells
UR - http://www.scopus.com/inward/record.url?scp=84865174608&partnerID=8YFLogxK
U2 - 10.1109/JPHOTOV.2011.2163925
DO - 10.1109/JPHOTOV.2011.2163925
M3 - Article
AN - SCOPUS:84865174608
VL - 1
SP - 37
EP - 42
JO - IEEE Journal of Photovoltaics
JF - IEEE Journal of Photovoltaics
SN - 2156-3381
IS - 1
M1 - 6006497
ER -